Term
| (Chap 1) Which is the most widely used semiconductor? A. copper B. germanium C. silicon D. none of the above |
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Definition
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Term
(Chap 1)
Silicon atoms combine into an orderly pattern called a:
A. covalent bond
B. crystal
C. semiconductor
D. valence orbit |
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Definition
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Term
(Chap 1)
The merging of a free electron and a hole is called:
A. covalent bonding
B. lifetime
C. recombination
D. thermal energy |
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Definition
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Term
(Chap 1)
The amount of time between the creation of a hole and its disappearance is called:
A. doping
B. lifetime
C. recombination
D. valance |
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Definition
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Term
(Chap 1)
When a voltage is applied to a semiconductor, holes will flow:
A. away from the negative potential
B. toward the positive terminal
C. in the external circuit
D. none of the above |
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Definition
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Term
(Chap 1)
At room temperature an intrinsic semiconductor has:
A. a few free electrons and holes
B. many holes
C. many free electrons
D. no holes |
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Definition
| A. a few free electrons and holes |
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Term
(Chap 1)
A donor atom has how many valence electrons?
A. 1
B. 3
C. 4
D. 5 |
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Definition
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Term
(Chap 1)
If you wanted to produce a P-type material, which would you use?
A. acceptor atoms
B. donor atoms
C. pentavalent impurity
D. silicone |
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Definition
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Term
| To produce a large forward current in a silicon diode, the applied voltage must be greater than: A. 0 B. 0.3V C. 0.7V D. 1V |
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Definition
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Term
(Chap 1)
Diffusion of free electrons across the junction of an unbiased diode produces:
A. forward bias
B. reverse bias
C. breakdown
D. the depletion layer |
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Definition
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Term
(Chap 1)
The n-type region of a junction diode is connected to the __________ terminal and the P-type region is connected to the __________.
A. cathode, anode
B. anode, cathode |
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Definition
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Term
(Chap 1)
You are going to measure the voltage drop across a forward biased diode in an operating circuit. What voltage would you expect if the diode were a silicon junction diode?
A. 0.6V
B. 0.2V
C. 0.3V
D. 0.9V |
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Definition
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Term
(Chap 1)
You are making voltage measurements in a series circuit consisting of a 10V DC source voltage, a 100 ohm resistor, and a silicon junction diode. The circuit is forward biased. What voltage would you expect to read across the resistor?
A. 9.4V
B. 10.3V
C. 10.6V
D. 10V |
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Definition
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Term
(Chap 1)
You are making voltage measurements in a series circuit consisting of a 10V DC source voltage, a 100 ohm resistor, and a silicon junction diode. The circuit is reverse biased. What voltage would you expect to read across the resistor?
A. 9.4V
B. 0V
C. 10.3V
D. 10V |
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Definition
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Term
(Chap 1)
You are making voltage measurements in a series circuit consisting of a 10V DC source voltage, a 100 ohm resistor, and a silicon junction diode. The circuit is forward biased. What voltage would you expect to read across the diode?
A. 0V
B. 10V
C. 9.4V
D. 0.3V |
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Definition
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Term
(Chap 1)
The knee voltage on a diode is approximately equal to the:
A. applied voltage
B. barrier potential
C. breakdown voltage
D. forward voltage |
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Definition
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Term
(Chap 1)
How much voltage is there across the second approximation of a silicon diode when it's forward biased?
A. 0V
B. 0.3V
C. 0.7V
D. source voltage |
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Definition
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Term
(Chap 1)
How much diode voltage is there with the first or ideal diode approximation?
A. 0V
B. 0.7V
C. more than 0.7V
D. 1V |
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Definition
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Term
(Chap 1)
The band on the end of a diode indicates what?
A. the diodes cathode
B. the diodes anode
C. the diodes breakdown voltage
D. the diodes tolerance |
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Definition
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Term
(Chap 1)
The arrow of a diode's schematic symbol points:
A toward the band on a diode
B. away from the band on a diode
C. toward the cathode on a diode
D. both A and C. |
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Definition
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Term
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Definition
I = 14V - 0.3V
330Ω
I = .041515A
I(F) = 42mA |
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Term
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Definition
I = 1.3V - 0.7V
47Ω
I = .01277A
I(F) = 13mA
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Term
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Definition
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Term
(Chap 2)
What is true about the breakdown voltage in a zener diode?
A. it decreases when current increases
B. it destroys the diode
C. it equals the current times the resistance
D. it is approximately constant |
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Definition
| D. it is approximately constant |
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Term
(Chap 2)
Which of these is the best description of a zener diode?
A. it is a diode
B. it is a constant voltage device
C. it is a constant current device
D. it works in the forward region |
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Definition
| B. it is a constant voltage device |
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Term
(Chap 2)
A zener diode:
A. is a battery
B. acts like a battery in the breakdown region
C. has a barrier potential of 1V
D. is forward biased |
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Definition
| B. acts like a battery in the breakdown region |
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Term
(Chap 2)
If the series resistance decreases in an unloaded zener regulator, the zener current:
A. decreases
B. stays the same
C. increases
D. equals the voltage divided by the resistance |
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Definition
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Term
(Chap 2)
If the load current decreases in a zener regulator, the zener current:
A. decreases
B. stays the same
C. increases
D. equals the source voltage divided by the series resistance |
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Definition
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Term
(Chap 2)
If the load current decreases in a zener regulator, the zener voltage:
A. decreases
B. stays the same
C. increases
D. none of the above |
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Definition
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Term
(Chap 2)
A LED is normally __________ when ON and __________ when OFF.
A. forward-biased, reverse-biased
B. reverse-biased, forward-biased
C. forward-biased, forward-biased
D. reverse-biased, reverse-biased |
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Definition
| A. forward-biased, reverse-biased |
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Term
(Chap 2)
What does it mean when the part number of a zener diode ends with the letter A?
A. It's an avalanche diode
B. it has a tolerance of 5%
C. it has a tolerance of 10%
D. it has a tolerance of 20% |
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Definition
| B. it has a tolerance of 5% |
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Term
(Chap 2)
How do you identify the cathode on an LED?
A. the longest lead is the cathode
B. the shortest lead is the cathode
C. the lead closest the the flat is the cathode
D. the lead opposite the flat is the cathode |
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Definition
B. the shortest lead is the cathode
C. the lead closest the the flat is the cathode |
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Term
(Chap 2)
You can always tell a bi-color LED from a single color LED because:
A. the plastic dome is made by fusing together two colors
B. the diode has three leads
C. it has a flat on one side
D. it has longer leads than standard LED's |
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Definition
| B. the diode has three leads |
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Term
(Chap 2)
This diode is known for its speed and is used in detectors, mixers, rectifiers, switches and limiters.
A. tunnel diodes
B. photo diode
C. Schottky diode
D. zener diode |
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Definition
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Term
(Chap 2)
This diode has strange forward-bias characteristics. As voltage is applied to the diode, the forward current will increase to a point, then it will reverse.
A. zener diode
B. photo diode
C. Schottky diode
D. tunnel diode |
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Definition
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Term
(Chap 2)
This diode is light sensitive.
A. tunnel diodes
B. photo diode
C. Schottky diode
D. LED |
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Definition
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Term
(Chap 2)
This diode changes capacitance with voltage applied.
A. varactor diode
B. photo diode
C. Schottky diode
D. zener diode |
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Definition
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Term
(Chap 2)
The reverse bias is increased on a varactor diode, its capacitance will go:
A. up
B. down |
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
LED
(Light Emitting Diode) |
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Term
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Definition
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Term
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Definition
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Term
|
Definition
I = 15V - 5.1V
500Ω
I = .0198A
I(RS) = 19.8mA |
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Term
| (Chap 2) Calculate the necessary resistance value and minimum power ratings of a series dropping resistor for an LED reared at 1.7V and 20mA, and a power supply voltage of 24V. Rs = __________ Pr = __________ |
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Definition
Rs = 24V - 1.7V = 1115 = 1.12kΩ
20mA
P(LED) = 1.7V * 20mA = .034W
P(R) = I²R = 20mA * 1.12kΩ = .446 W
P(T) = P(R) + P(LED) = .446W + .034W = .480W = 1/2W
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Term
(Chap 3)
Which circuit has the worst ripple voltage
A. full wave rectifier
B. full wave bridge rectifier
C. half wave rectifier
D. all of the above |
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Definition
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Term
(Chap 3)
With a half-wave rectified voltage across a load resistor with no filter, load current flows for what part of a cycle?
A. 0 degrees
B. 90 degrees
C. 180 degrees
D. 360 degrees |
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Definition
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Term
(Chap 3)
The voltage out of a bridge rectifier is a:
A. half-wave signal
B. full-wave signal
C. bridge-rectified signal
D. sine wave |
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Definition
| C. bridge-rectified signal |
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Term
(Chap 3)
What is the peak load voltage out of a bridge rectifier for a secondary voltage of 15 V(RMS)?
A. 9.2V
B. 15V
C. 19.8V
D. 24.3V |
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Definition
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Term
(Chap 3)
If line frequency is 60Hz, the output frequency of a bridge rectifier is:
A. 30 Hz
B. 60 Hz
C. 120 Hz
D. 240 Hz |
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Definition
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Term
(Chap 3)
With the same secondary voltage and filter, which produces the highest load voltage?
A. half-wave rectifier
B. full-wave rectifier
C. bridge rectifier
D. impossible to say |
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Definition
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Term
(Chap 3)
When a power supply is first turned on:
A. there is a large surge current
B. the filter capacitors slowly charge
C. there is a large peak voltage spike
D. the filter capacitors provide stored current |
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Definition
| A. there is a large surge current |
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Term
(Chap 3)
If the filter capacitance is increased, the ripple will:
A. decrease
B. increase
C. stay the same
D. none of the above |
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Definition
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Term
(Chap 3)
If the output of a regulator varies from 20 to 19.8V when the line voltage varies over its specified range, the percentage regulation is closest to:
A. 0
B. 1%
C. 2%
D. 5% |
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Definition
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Term
(Chap 3)
A 7912 voltage regulator has an output voltage of:
A. +1.2V
B. -1.2V
C. +12V
D. -12V |
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Definition
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Term
(Chap 3)
Multiple rectifier diodes may be put in series to:
A. increase their current handling capacity
B. increase their PIV
C. decrease their forward voltage drop
D. decrease their PIV |
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Definition
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Term
(Chap 3)
The feedback circuit in a switching power supply:
A. compensates for load conditions
B. monitors the input voltage
C. monitors the output voltage
D. adjusts the filtering current |
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Definition
| A. compensates for load conditions |
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Term
(Chap 3)
A typical operating frequency of a switching power supply is:
A. 60Hz
B. 70kHz
C. 18kHz
D. 2kHz |
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Definition
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Term
Switching power supplies are extensively used in:
A. portable audio devices
B. low noise amplifiers
C. car radios
D. PCs |
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Definition
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Term
(Chap 3)
In a zener diode voltage regulator:
A. The zener draws more current when the voltage increases across it
B. the zener is forward biased
C. the zener draws more current when the voltage drops across it |
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Definition
| A. The zener draws more current when the voltage increases across it |
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Term
(Chap 3)
_____ Rates the action of a filter
A. uses one diode
B. percent ripple
C. 7815
D. RC filter
E. regulator
G. uses two diodes
H. needed for full-wave
I. LC filter
J. uses four diodes
K. 60Hz |
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Definition
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Term
(Chap 3)
_____ full-wave rectifier
A. uses one diode
B. percent ripple
C. 7815
D. RC filter
E. regulator
G. uses two diodes
H. needed for full-wave
I. LC filter
J. uses four diodes
K. 60Hz |
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Definition
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Term
(Chap 3)
_____ ripple frequency of a half-wave rectifier
A. uses one diode
B. percent ripple
C. 7815
D. RC filter
E. regulator
G. uses two diodes
H. needed for full-wave
I. LC filter
J. uses four diodes
K. 60Hz |
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Definition
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Term
(Chap 3)
_____ center-tapped transformer
A. uses one diode
B. percent ripple
C. 7815
D. RC filter
E. regulator
G. uses two diodes
H. needed for full-wave
I. LC filter
J. uses four diodes
K. 60Hz |
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Definition
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Term
(Chap 3)
_____ IC regulator
A. uses one diode
B. percent ripple
C. 7815
D. RC filter
E. regulator
G. uses two diodes
H. needed for full-wave
I. LC filter
J. uses four diodes
K. 60Hz |
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Definition
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Term
(Chap 3)
_____ bridge rectifier
A. uses one diode
B. percent ripple
C. 7815
D. RC filter
E. regulator
G. uses two diodes
H. needed for full-wave
I. LC filter
J. uses four diodes
K. 60Hz |
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Definition
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Term
(Chap 3)
_____ holds output voltage steady
A. uses one diode
B. percent ripple
C. 7815
D. RC filter
E. regulator
G. uses two diodes
H. needed for full-wave
I. LC filter
J. uses four diodes
K. 60Hz |
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Definition
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Term
(Chap 3)
_____ basically a low-pass filter
A. uses one diode
B. percent ripple
C. 7815
D. RC filter
E. regulator
G. uses two diodes
H. needed for full-wave
I. LC filter
J. uses four diodes
K. 60Hz |
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Definition
|
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Term
(Chap 3)
_____ half-wave rectifier
A. uses one diode
B. percent ripple
C. 7815
D. RC filter
E. regulator
G. uses two diodes
H. needed for full-wave
I. LC filter
J. uses four diodes
K. 60Hz |
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Definition
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Term
(Chap 3)
_____ doesn't dissipate heat
A. uses one diode
B. percent ripple
C. 7815
D. RC filter
E. regulator
G. uses two diodes
H. needed for full-wave
I. LC filter
J. uses four diodes
K. 60Hz |
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Definition
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Term
|
Definition
|
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Term
(Chap 4)
_____ The two most common types of diode multiplier circuits are:
A. fixed and variable
B. full-wave and bridge
C. doublers and triplers
D. Simon and Garfunkel |
|
Definition
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Term
(Chap 4)
_____ The advantage a half-wave doubler offers over a full-wave doubler is:
A. it has fewer parts
B. it's easier to filter
C. it doesn't require a center-tapped transformer
D. none of the above |
|
Definition
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Term
(Chap 4)
_____ A positive series clipper will:
A. pass the positive portion of a signal
B. pass the negative portion of a signal
C. clip portions of both the positive and negative half cycles
D. none of the above |
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Definition
| B. pass the negative portion of a signal |
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Term
(Chap 4)
_____ Back to back zeners can be replaced with a:
A. SCR
B. triac
C. transient suppression diode
D. MOV |
|
Definition
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Term
(Chap 4)
_____ A varistor is:
A. a variable transformer
B. a variable resistor
C. a voltage dependent resistor
D. none of the above |
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Definition
| C. a voltage dependent resistor |
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Term
(Chap 4)
_____ Negative or positive clampers will clip the negative or positive portion of the input signal.
A. true
B. false |
|
Definition
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Term
(Chap 4)
_____ A diode clamper will:
A. clip off a portion of the input signal
B eliminate the positive or negative alternation of a signal
C. add an AC voltage to a signal
D. add a DC voltage to a signal |
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Definition
| D. add a DC voltage to a signal |
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Term
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Definition
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Term
|
Definition
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Term
(Chap 4)
A clamper circuit does all of the following except:
A. change the DC offset
B. change the shape of the waveform
C. shift a signal above or below ground
D. use a capacitor instead of a DC voltage source |
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Definition
| B. change the shape of the waveform |
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Term
|
Definition
Positive Clipper
or
Positive Limiter |
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
|
Definition
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Term
|
Definition
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Term
|
Definition
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Term
|
Definition
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Term
(Chap 5)
A BJT has how many doped regions?
A. 1
B. 2
C. 3
D. 4 |
|
Definition
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Term
(Chap 5)
In the NPN transistor, the majority carriers in the base are:
A. free electrons
B. holes
C. neither
D. both A & B |
|
Definition
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Term
(Chap 5)
The emitter diode is usually:
A. forward biased
B. revers biased
C. non-conducting
D. operating in the breakdown region |
|
Definition
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Term
(Chap 5)
For normal operation of a transistor, the collector diode has to be:
A. forward biased
B. revers biased
C. non-conducting
D. operating in the breakdown region |
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Definition
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Term
(Chap 5)
The base is thin and:
A. heavily doped
B. lightly doped
C. metallic
D. doped by a pentavalent material |
|
Definition
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Term
(Chap 5)
The current gain of a transistor is the ratio of the?
A. collector current to emitter current
B. collector current to base current
C. base current to collector current
D. emitter current to collector current |
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Definition
| B. collector current to base current |
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Term
(Chap 5)
Increasing the collector supply voltage will increase:
A. base current
B. collector current
C. emitter current
D. none of the above |
|
Definition
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Term
(Chap 5)
In a normally biased NPN transistor, the electrons in the emitter have enough energy to overcome the barrier potential of the:
A. base-emitter junction
B. base-collector junction
C. collector-base junction
D. recombination path |
|
Definition
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Term
(Chap 5)
What is the most important fact about the collector current?
A. it is measured in milli-amperes
B. it equals the base current divided by the current gain
C. it is small
D. it approximately equals the emitter current |
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Definition
| D. it approximately equals the emitter current |
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Term
(Chap 5)
Which transistor type takes a negative voltage configuration on its collector?
A. NPN
B. PNP
C. either one |
|
Definition
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Term
(Chap 5)
DC current gain in a transistor is called:
A. Vcc
B. Beta
C. Gamma
D. Alpha |
|
Definition
|
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Term
(Chap 5)
Bipolar junction transistors are:
A. current amplifiers that are normally on
B. current amplifiers that are normally off
C. voltage amplifiers that are normally on
D. voltage amplifiers that are normally off |
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Definition
| B. current amplifiers that are normally off |
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Term
(Chap 5)
In a NPN voltage divider circuit, saturation happens:
A. when an increase in base current no longer causes an increase in the collector current
B. when an increase in emitter-base voltage no longer causes an increase in the collector current
C. when an increase in emitter current no longer causes an increase in the collector current
D. when an increase in bias voltage no longer causes an increase in the base current |
|
Definition
| A. when an increase in base current no longer causes an increase in the collector current |
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|
Term
(Chap 5)
Transistors are:
A. three junction, two terminal devices
B. three junction, three terminal devices
C. two junction, three terminal devices
D. two junction, two terminal devices |
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Definition
| C. two junction, three terminal devices |
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Term
(Chap 5)
The voltage drop across a forward-biased emitter-base junction is normally:
A. 0.3V to 0.4V
B. 0.2V to 0.35V
C. 0.6V to 0.7V
D. 0V |
|
Definition
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Term
(Chap 5)
_____ voltage or current that sets up the no-input signal bias voltage
A. cutoff
B. heavily doped
C. active region
D. Q point
E. V(BE)
G. DC load line
H. base bias
I. lightly doped
J. saturation
K. family of curves |
|
Definition
|
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Term
(Chap 5)
_____ graph for a typical CE transistor
A. cutoff
B. heavily doped
C. active region
D. Q point
E. V(BE)
G. DC load line
H. base bias
I. lightly doped
J. saturation
K. family of curves |
|
Definition
|
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Term
(Chap 5)
_____ a further increase in bias voltage does not increase current
A. cutoff
B. heavily doped
C. active region
D. Q point
E. V(BE)
G. DC load line
H. base bias
I. lightly doped
J. saturation
K. family of curves |
|
Definition
|
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Term
(Chap 5)
_____ typically used on switching circuits
A. cutoff
B. heavily doped
C. active region
D. Q point
E. V(BE)
G. DC load line
H. base bias
I. lightly doped
J. saturation
K. family of curves |
|
Definition
|
|
Term
(Chap 5)
_____ represents all DC operating points for a given load resistance
A. cutoff
B. heavily doped
C. active region
D. Q point
E. V(BE)
G. DC load line
H. base bias
I. lightly doped
J. saturation
K. family of curves |
|
Definition
|
|
Term
(Chap 5)
_____ occurs when bias voltage is reduced so not current flows
A. cutoff
B. heavily doped
C. active region
D. Q point
E. V(BE)
G. DC load line
H. base bias
I. lightly doped
J. saturation
K. family of curves |
|
Definition
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Term
(Chap 5)
_____ base
A. cutoff
B. heavily doped
C. active region
D. Q point
E. V(BE)
G. DC load line
H. base bias
I. lightly doped
J. saturation
K. family of curves |
|
Definition
|
|
Term
(Chap 5)
_____ emitter diode voltage
A. cutoff
B. heavily doped
C. active region
D. Q point
E. V(BE)
G. DC load line
H. base bias
I. lightly doped
J. saturation
K. family of curves |
|
Definition
|
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Term
(Chap 5)
_____ emitter
A. cutoff
B. heavily doped
C. active region
D. Q point
E. V(BE)
G. DC load line
H. base bias
I. lightly doped
J. saturation
K. family of curves |
|
Definition
|
|
Term
(Chap 5)
_____ flat part of a characteristic curve
A. cutoff
B. heavily doped
C. active region
D. Q point
E. V(BE)
G. DC load line
H. base bias
I. lightly doped
J. saturation
K. family of curves |
|
Definition
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Term
|
Definition
V(RE) = 5.44V - .7V = 4.75V
I(E) = 4.75V = .032A
150
I(E) = 32mA |
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Term
(Chap 6)
Which of the low is considered the most common BJT configuration?
A. common base
B. common collector
C. common emitter
D. the emitter follower |
|
Definition
|
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Term
(Chap 6)
Of the configuration listed below, which configuration has a very low put impedance?
A. common emitter
B. common collector
C. common base
D. none of the above |
|
Definition
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Term
(Chap 6)
Of the configurations listed below, which configuration has a voltage gain of less than one?
A. common emitter
B. common collector
C. common base
D. none of the above |
|
Definition
|
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Term
(Chap 6)
A class __________ amplifier has its operating point set at cutoff.
A. A
B. B
C. C
D. AB |
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Definition
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Term
(Chap 6)
A class __________ amplifier has it's operating point set below cutoff.
A. A
B. B
C. C
D. AB |
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Definition
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Term
(Chap 6)
A class __________ amplifier has it's operating point set slightly above cutoff.
A. A
B. B
C. C
D. AB |
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Definition
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Term
(Chap 6)
A class __________ amplifier has its operating point set near the center of a load line.
A. A
B. B
C. C
D. AB |
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Definition
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Term
The power gain of a class B push-pull amplifier is:
A. equal to the voltage gain
B. equal to P(out) divided by P(in)
C. less than the voltage gain
D. equal to twice the amplifiers current gain |
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Definition
| B. equal to P(out) divided by P(in) |
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Term
(Chap 6)
In a common emitter amplifier, the output:
A. is always less than the input
B. is 90-degrees out of phase with the input
C. is in phase with the input
D. is 180-degrees out of phase with the input |
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Definition
| D. is 180-degrees out of phase with the input |
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Term
(Chap 6)
When looking on a transistor's data sheet, which value indicates the transistor's current gain?
A. IC/IE ratio
B. Hfe
C. Vbb
D. Q |
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Definition
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Term
(Chap 6)
You are making calculations to bias a transistor for class C operation. Where should the Q point be on the load line?
A. where IC = 0 and VCE = 0
B. where IC = max and VCE = 0
C. on the mid point of the load line
D. where IC = 0 and VCE = VCC |
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Definition
| D. where IC = 0 and VCE = VCC |
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Term
(Chap 6)
If a transistor is going to be operated in a hot environment, the transistor's ratings must be:
A. cut by one forth
B. cut in half
C. derated
D. increased |
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Definition
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Term
(Chap 6)
Which class of amplifier is the most efficient?
A. Class A
B. Class AB
C. Class B
D. Class C |
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Definition
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Term
(Chap 6)
You measure the voltage across the collector and emitter of a common emitter amplifier. The voltage is equal to VCC. The transistor is:
A. probably at cutoff
B. probably at its saturation point |
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Definition
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Term
(Chap 6)
The main advantage of a Darlington pair type of amplifier is:
A. low gain and low power to the load
B. high gain and high power to the load
C. high power dissipation
D. high gain and low power to the load |
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Definition
| B. high gain and high power to the load |
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Term
(Chap 6)
_____ amplifier's mode of operation
A. eta symbol
B. push-pull
C. beta symbol
D. class B
E. gain
F. class
G. class AB
H. current gain
I. efficiency
J. class C
K. class A |
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Definition
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Term
(Chap 6)
_____ ratio of output signal to input signal amplitude
A. eta symbol
B. push-pull
C. beta symbol
D. class B
E. gain
F. class
G. class AB
H. current gain
I. efficiency
J. class C
K. class A |
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Definition
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Term
(Chap 6)
_____ ratio of power to an amplifiers load to the power consumed
A. eta symbol
B. push-pull
C. beta symbol
D. class B
E. gain
F. class
G. class AB
H. current gain
I. efficiency
J. class C
K. class A |
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Definition
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Term
(Chap 6)
_____ current flows slightly less than one full AC input cycle
A. eta symbol
B. push-pull
C. beta symbol
D. class B
E. gain
F. class
G. class AB
H. current gain
I. efficiency
J. class C
K. class A |
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Definition
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Term
(Chap 6)
_____ current flows less than 1/2 of AC input cycle
A. eta symbol
B. push-pull
C. beta symbol
D. class B
E. gain
F. class
G. class AB
H. current gain
I. efficiency
J. class C
K. class A |
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Definition
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Term
(Chap 6)
_____ current flows during entire AC input cycle
A. eta symbol
B. push-pull
C. beta symbol
D. class B
E. gain
F. class
G. class AB
H. current gain
I. efficiency
J. class C
K. class A |
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Definition
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Term
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Definition
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Term
(Chap 6)
_____ current flow 50% of input AC cycle
A. eta symbol
B. push-pull
C. beta symbol
D. class B
E. gain
F. class
G. class AB
H. current gain
I. efficiency
J. class C
K. class A
|
|
Definition
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Term
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Definition
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Term
(Chap 6)
_____ I(out)/I(in)
A. eta symbol
B. push-pull
C. beta symbol
D. class B
E. gain
F. class
G. class AB
H. current gain
I. efficiency
J. class C
K. class A |
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Definition
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Term
(Chap 6)
_____ type of class B amplifier
A. eta symbol
B. push-pull
C. beta symbol
D. class B
E. gain
F. class
G. class AB
H. current gain
I. efficiency
J. class C
K. class A |
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
| (Chap 6) An amplifier has an input of 25mV and an output of 4 volts. Calculate the voltage gain of the amplifier in decibels. |
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Definition
20 log( 4v ) = 44 db
25mV |
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Term
(Chap 7)
A JFET:
A. is a voltage controlled device
B. is a current controlled device
C. has a low input resistance
D. has a very large voltage gain |
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Definition
| A. is a voltage controlled device |
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Term
(Chap 7)
When a JFET is cutoff, the depletion layers are:
A. far apart
B. close together
C. touching
D. conducting |
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Definition
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Term
(Chap 7)
When the gate voltage becomes more positive in a P-channel JFET, the channel between the depletion layers becomes:
A. narrower
B. wider
C. conducting
D. non-conducting |
|
Definition
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Term
(Chap 7)
Transconductance is measured in:
A. ohms
B. amps
C. volts
D. siemens |
|
Definition
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Term
The current flow in an N-channel JFET is controlled by the:
A. base
B. drain
C. gate
D. source |
|
Definition
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Term
(Chap 7)
The maximum amount of current flows in an ideal JFET when V(GS) is:
A. 0V
B. 0.3V
C. 0.7V
D. 0.9V |
|
Definition
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Term
(Chap 7)
Transconductance is identified on a data sheet as:
A. g(m)
B. g(mo)
C. S
D. I(DSS) |
|
Definition
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Term
(Chap 7)
The transconductance curve of a JFET is:
A. hyperbolic
B. linear
C. nonlinear
D.symmetrical |
|
Definition
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Term
(Chap 7)
The depletion mode MOSFET can:
A. operate with only positive gate voltages
B. operate with only negative gate voltages
C. not operate in the ohmic region
D. operate with positive as well as negative gate voltages |
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Definition
| D. operate with positive as well as negative gate voltages |
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Term
(Chap 7)
In a JFET, current flow from:
A. source to drain
B. gate to source
C. gate to drain
D. drain to gate |
|
Definition
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Term
(Chap 7)
The I(DSS) level is drain current:
A. when the drain current is at its maximum
B. when the drain is pinched off
C. when the gate voltage (V(GS)) is at maximum
D. when the gate voltage (V(GS)) is zero |
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Definition
| D. when the gate voltage (V(GS)) is zero |
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Term
(Chap 7)
JFET gate bias:
A. requires no external resistor
B. creates a forward bias voltage
C. is a very popular bias arrangement
D. requires an external bias arrangement |
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Definition
| D. requires an external bias arrangement |
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Term
(Chap 7)
A JFET source follower:
A. has a voltage gain of less than unity
B. has an inverted output
C. has a high gain
D. has a high input impedance and a low output impedance |
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Definition
| A. has a voltage gain of less than unity |
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Term
(Chap 7)
Which MOSFET has no physical drain source channel?
A. E-MOSFET
B. D-MOSFET
C. JFET
D. none of the above |
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Definition
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Term
(Chap 7)
Because of a MOSFET's thin gate, what could damage the gate?
A. high gate current
B. being reverse biased
C. ESD
D. high source current |
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
Common Drain
(Source Follower) |
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
|
Definition
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Term
|
Definition
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Term
(Chap 8)
If the voltage from +V to ground on a differential power supply is +14V, you would expect to measure __________ from -V to ground.
A. +28V
B. -28V
C. -14V
D. +14V |
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Definition
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Term
(Chap 8)
If the signal to the inverting input terminal of an op amp is negative, the output signal will be __________.
A. negative
B. positive
C. impossible to tell |
|
Definition
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Term
(Chap 8)
The two inputs to an op amp are:
A. fixed and variable
B. zero and span
C. inverting and non-inverting
D. set point and null |
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Definition
| C. inverting and non-inverting |
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Term
(Chap 8)
If the voltage on the non-inverting input is raised (made more positive), while the voltage on the inverting input is kept unchanged, will the output voltage:
A. rise
B. fall
C. stay the same |
|
Definition
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Term
(Chap 8)
The open loop gain on an inverting op amp is typically around 100,000.
A. true
B. false |
|
Definition
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Term
(Chap 8)
The voltage on the inverting input is raised (made more positive), while the voltage on the non-inverting input is kept unchanged, will the output voltage:
A. rise
B. fall
C. stay the same |
|
Definition
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Term
(Chap 8)
If the voltages on the non-inverting and inverting inputs are raised by the same amount, will the output voltage:
A. rise
B. fall
C. stay the same |
|
Definition
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Term
(Chap 8)
Which of the below is true?
A. An ideal op-amp has infinite input impedance, and zero output impedance.
B. An ideal op-amp has infinite input impedance, and infinite output impedance.
C. An ideal op-amp has zero input impedance, and zero output impedance.
D. An ideal op-amp has zero input impedance, and infinite output impedance. |
|
Definition
| A. An ideal op-amp has infinite input impedance, and zero output impedance. |
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Term
(Chap 8)
Operational amplifiers with no feedback have:
A. low gain
B. low input impedance
C. high gain
D. unity gain |
|
Definition
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Term
(Chap 8)
Instrumentation amplifiers are special op-amps which are designed for use in:
A. digital circuits
B. filter circuits
C. measuring equipment and circuits
D. RF applications |
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Definition
| C. measuring equipment and circuits |
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Term
(Chap 8)
_____ maintains constant current through a load despite changes in that load's resistance.
A. op amp
B. comparator
C. virtual ground
D. open loop gain
E. rail to rail
F. current mirror
G. active load
H. V to I
I. CMRR
J. voltage follower |
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Definition
|
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Term
(Chap 8)
_____ used often in process control for converting 4-20mA signals to voltage
A. op amp
B. comparator
C. virtual ground
D. open loop gain
E. rail to rail
F. current mirror
G. active load
H. V to I
I. CMRR
J. voltage follower |
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Definition
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Term
(Chap 8)
_____ the ratio between a differential amplifiers differential voltage gain and its common-mode voltage gain.
A. op amp
B. comparator
C. virtual ground
D. open loop gain
E. rail to rail
F. current mirror
G. active load
H. V to I
I. CMRR
J. voltage follower |
|
Definition
|
|
Term
(Chap 8)
_____ maximum output voltage swing of an op amp
A. op amp
B. comparator
C. virtual ground
D. open loop gain
E. rail to rail
F. current mirror
G. active load
H. V to I
I. CMRR
J. voltage follower |
|
Definition
|
|
Term
(Chap 8)
_____ output is a copy of the inputs magnitude and polarity
A. op amp
B. comparator
C. virtual ground
D. open loop gain
E. rail to rail
F. current mirror
G. active load
H. V to I
I. CMRR
J. voltage follower |
|
Definition
|
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Term
(Chap 8)
_____ a particular type of differential amplifier
A. op amp
B. comparator
C. virtual ground
D. open loop gain
E. rail to rail
F. current mirror
G. active load
H. V to I
I. CMRR
J. voltage follower |
|
Definition
|
|
Term
(Chap 8)
_____ simplest of all op amp circuits
A. op amp
B. comparator
C. virtual ground
D. open loop gain
E. rail to rail
F. current mirror
G. active load
H. V to I
I. CMRR
J. voltage follower |
|
Definition
|
|
Term
(Chap 8)
_____ voltages at both inputs are maintained at exactly the same level
A. op amp
B. comparator
C. virtual ground
D. open loop gain
E. rail to rail
F. current mirror
G. active load
H. V to I
I. CMRR
J. voltage follower |
|
Definition
|
|
Term
(Chap 8)
_____ differential voltage gain of the amplifier without any feedback
A. op amp
B. comparator
C. virtual ground
D. open loop gain
E. rail to rail
F. current mirror
G. active load
H. V to I
I. CMRR
J. voltage follower |
|
Definition
|
|
Term
(Chap 8)
_____ usually a current mirror behaving like a current regulator rather than a true current source.
A. op amp
B. comparator
C. virtual ground
D. open loop gain
E. rail to rail
F. current mirror
G. active load
H. V to I
I. CMRR
J. voltage follower |
|
Definition
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Term
|
Definition
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Term
|
Definition
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Term
|
Definition
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Term
|
Definition
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Term
|
Definition
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Term
|
Definition
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Term
|
Definition
V(cc) = -27kΩ * 1.5V = -8.1V
5kΩ |
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Term
|
Definition
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Term
|
Definition
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Term
|
Definition
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Term
|
Definition
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Term
|
Definition
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Term
(Chap 9)
If an op amp were ideal, the CMRR would be:
A. zero
B. equal to the differential gain
C. infinite
D. both A and C |
|
Definition
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Term
(Chap 9)
If the input is a rectangular pulse, the output of an integrator is a:
A. sine wave
B. square wave
C. ramp
D. rectangular wave |
|
Definition
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Term
(Chap 9)
An instrumentation amplifier has a high:
A. output impedance
B. power gain
C. CMRR
D. supply voltage |
|
Definition
|
|
Term
(Chap 9)
The virtual ground of an op-amp circuit:
A. cannot have zero voltage
B. cannot sink current
C. is always positive
D. is the same as AC ground |
|
Definition
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Term
(Chap 9)
In a current to voltage converter, the input current flows:
A. through the input impedance of the op amp
B. through the feedback resistor
C. to ground
D. through the load resistor |
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Definition
| B. through the feedback resistor |
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Term
(Chap 9)
A common mode signal is applied to:
A. the non-inverting input
B. the inverting input
C. both inputs
D. none of the above |
|
Definition
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Term
(Chap 9)
The input stage of an op amp is usually a:
A. differential amplifier
B. class B push-pull amplifier
C. CE amplifier
D. swamped amplifier |
|
Definition
| A. differential amplifier |
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Term
(Chap 9)
The two adjustments commonly used with instrumentation amplifiers are:
A. fixed and variable
B. null and offset
C. offset and span
D. zero and span |
|
Definition
|
|
Term
(Chap 9)
Instrumentation amplifiers are special op-amps which are designed for use in:
A. digital circuits
B. filter circuits
C. measuring equipment and circuits
D. RF applications |
|
Definition
| C. measuring equipment and circuits |
|
|
Term
(Chap 9)
_____ used in process control loops for calibration
A. integral
B. CMRR
C. instrumentation amplifier
D. zero and span
E. derivative |
|
Definition
|
|
Term
(Chap 9)
_____ optimized for high input impedance and CMRR
A. integral
B. CMRR
C. instrumentation amplifier
D. zero and span
E. derivative |
|
Definition
| C. instrumentation amplifier |
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|
Term
(Chap 9)
_____ a rate, the slope of a line drawn tangent to a curve
A. integral
B. CMRR
C. instrumentation amplifier
D. zero and span
E. derivative |
|
Definition
|
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Term
(Chap 9)
_____ ability of an op amp to eliminate electrical noise
A. integral
B. CMRR
C. instrumentation amplifier
D. zero and span
E. derivative |
|
Definition
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Term
| (Chap 9) _____ the area under a curve A. integral B. CMRR C. instrumentation amplifier D. zero and span E. derivative |
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Definition
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Term
|
Definition
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Term
|
Definition
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Term
|
Definition
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Term
(Chap 10)
For an oscillator to work, it must have:
A. positive feedback
B. negative feedback
C. no feedback
D. feedback at 90 degrees to the input |
|
Definition
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|
Term
(Chap 10)
The schematic symbol for a crystal is:
A. CRS
B. Y
C. XTL
D. LX |
|
Definition
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|
Term
(Chap 10)
Which of the following is not one of the conditions to begin and sustain oscillations?
A. a frequency determining device
B. amplification
C. regenerative feedback
D. tunable capacitor or inductor |
|
Definition
| D. tunable capacitor or inductor |
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|
Term
(Chap 10)
How many RC networks does the phase shift oscillator contain?
A. 1
B. 2
C. 3
D. 4 |
|
Definition
|
|
Term
(Chap 10)
In order to sustain oscillations in a feedback oscillator, the gain should be:
A. equal to 1
B. less than 1
C. greater than 1
D. much greater than 1 |
|
Definition
|
|
Term
(Chap 10)
A Wien-bridge oscillator uses:
A. positive feedback
B. negative feedback
C. both types of feedback
D. an LC tank circuit |
|
Definition
| C. both types of feedback |
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|
Term
(Chap 10)
Multivibrators produce:
A. sine waves only
B. triangular waves only
C. sawtooth waves only
D. rectangular waves only |
|
Definition
| D. rectangular waves only |
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|
Term
(Chap 10)
Which of the following multivibrators do not run continuously as do oscillators?
A. one-shot
B. astable
C. relaxation
D. flip-flop |
|
Definition
|
|
Term
(Chap 10)
The total capacitance in a Colpitts oscillator is found by:
A. summing the two capacitors
B. averaging the two capacitors
C. using product-over-sum rule
D. using the largest as the dominant capacitance |
|
Definition
| C. using product-over-sum rule |
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|
Term
(Chap 10)
To vary the output frequency of oscillators, you can vary the values of the:
A. resistance
B. bias voltage
C. power supply
D. inductance or capacitance |
|
Definition
| D. inductance or capacitance |
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|
Term
(Chap 10)
The voltage that starts the oscillator is caused by:
A. ripple from the power supply
B. noise voltage in resistors
C. the input signal from a generator
D. positive feedback |
|
Definition
|
|
Term
(Chap 10)
The Wien-bridge oscillator is useful:
A. at low frequencies
B. at high frequencies
C. with LC tank circuits
D. at small input signals |
|
Definition
|
|
Term
(Chap 10)
The Hartley oscillator uses:
A. negative feedback
B. two inductors
C. a tungsten lamp
D. a tickler coil |
|
Definition
|
|
Term
(Chap 10)
The series and parallel resonant frequencies of a crystal are:
A. very close together
B. very far apart
C. equal
D. low frequencies |
|
Definition
|
|
Term
(Chap 10)
The major advantage of a crystal oscillator is:
A. it's inexpensive
B. its output is extremely stable
C. its resonant frequency is tunable
D. all of the above |
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Definition
| B. its output is extremely stable |
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Definition
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Definition
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