3-1A1:  The Product of the readings of an AC voltmeter and AC ammeter is called:

Apparent power

3-1A2:  What is the basic unit of electrical power?

Watt

Power = P = watt

3-1A3:  What is the term used to express the amount of electrical energy stored in an electrostatic field?

Joules

Joules = Capacity to do work = Stored in Capacitors = Defibrillators

3-1A4:  What device is used to store electrical energy in an electrostatic field?

Capacitor

3-1A5:  What formula would determine the inductive reactance of a coil if frequency and coil inductance are known?

X_L = 2 * ∏ * f * L

3-1A6:  What is the term for the out-of-phase power associated with inductors and capacitors?

Reactive Power

Reactive Power = Non-Productive = Out of Phase Power

 3-2A1:  What determines the strength of the magnetic field around a conductor?

The amount of current

3-2A2:  What will produce a magnetic field?

A current flowing through a conductor

3-2A3:  When induced currents produce expanding magnetic fields around conductors in a direction that opposes the original magnetic field, this is known as:

Lenz's Law

3-2A4:  The opposition to the creation of magnetic lines of force in a magnetic circuit is known as:

Reluctance

3-2A5:  What is meant by the term "back EMF?"

A voltage that opposes the applied EMF

3-2A6:  Permeability is defined as:

The ratio of magnetic flux density in a substance to the magnetizing force that produces it

3-3A1:  What metal is usually employed as a sacraficial anode for corrosion control purposes?

Zinc bar

3-3A2:  What is the relative dielectric constant for air?

1

3-3A3:  Which metal object may be least affected by galvanic corrosion when submerged in seawater?

Stainless steel propeller shaft

3-3A4:  Skin effect is the phenomenon where:

RF current flows in a thin layer of the conductor, closer to the surface, as frequency increases

3-3A5:  Corrosion resulting from electric current flow between dissimilar metals is called:

Galvanic corrosion

3-3A6:  Which of these will be most useful for insulation at UHF frequencies?

Mica

and Teflon

3-4A1:  What formula would calculate the total inductance of inductors in series?

L_T = L₁ + L₂

3-4A2:  Good conductors with minimum resistance have what type of electrons?

Many free electons

3-4A3:  Which of the 4 groups of metals listed below are the best low-resistance conductors?

Gold, silver and copper

Gold, Silver, Copper, Aluminum, Nickel, Iron, Lead

3-4A4:  What is the purpose of a bypass capacitor?

It removes alternating current by providing a low impedance path to ground

3-4A5:  How would you calculate the total capacitance of three capacitors in parallel?

C_T = C₁ + C₂ + C₃

3-4A6:  How might you reduce the inductance of an antenna coil?

Reduce the number of turns

3-5A1:  What are the two most commonly-used specifications for a junction diode?

Maximum forward current and PIV, (peak inverse voltage)

3-5A2:  What limits the maximum forward current in a junction diode?

The junction temperature

3-5A3:  MOSFETs are manufactured with THIS protective device built into their gate to protect the device from static charges and excessive voltages:

Zener diode

3-5A4:  What are the two basic types of junction field-effect transistors?

N-channel and P-channel

3-5A5:  A common emitter amplifier has:

More voltage gain than a common collector

3-5A6:  How does the input impedance of a field-effect transistor compare with that of a bipolar transistor?

An FET has high input impedance; a bipolar transistor has low input impedance

3-6A1:  An AC ammeter indicates:

Effective (RMS) values of current

3-6A2:  By what factor must the voltage of an AC circuit, as indicated on the scale of an AC voltmeter, be multiplied to obtain the peak voltage value?

1.414

3-6A3: What is the RMS voltage at a common household electrical power outlet?

117-V AC

3-6A4:  What is the easiest voltage amplitude to measure by viewing a pure sine wave signal on an oscilloscope?

Peak-to-peak

Sine Wave goes peak to peak 

3-6A5:  By what factor must the voltage measured in an AC circuit, as indicated on the scale of an AC voltmeter be multiplied to obtain the average voltage value?

0.9

3-6A6:  What is the peak voltage at a common household electrical outlet?

165.5 volts

3-7A1:  What is a sine wave?

A wave whose amplitude at any given instant can be represented by the projection of a point on a wheel rotating at a uniform speed

3-7A2:  How many degrees are there in one complete sine wave cycle?

360 Degrees

3-7A3:  What type of wave is made up of sine waves of the fundamental frequency and all the odd harmonics?

Square

3-7A4:  What is the description of a square wave?

A wave that abruptly changes back and forth between two voltage levels and stays at these levels for equal amounts of time

3-7A5:  What type of wave is made up of sine waves at the fundamental frequency and all the harmonics?

Sawtooth wave

3-7A6:  What type of wave is characterized by a rise time significantly faster than the fall time (or vice versa)?

Sawtooth wave

3-8A1:  What is the term used to identify an AC voltage that would cause the same heating in a resistor as a corresponding value of DC voltage?

Root mean square (RMS)

3-8A2:  What happens to reactive power in a circuit that has both inductors and capacitors?

It alternates between magnetic and electric fields and is not dissipated

3-8A3:  Halving the cross-sectional area of a conductor will:

Double the resistance

3-8A4:  Which of the following groups is correct for listing common materials in order of descending conductivity?

Silver, copper, aluminum, iron and lead

3-8A5:  How do you computer true power (power dissipated in the circuit) in a circuit where AC voltage and current are out of phase?

Multiply apparent power times the power factor

3-8A6:  Assuming a power source to have a fixed value of internal resistance maximum power will be transferred to the load when:

The load impedance equals the internal impedance of the source

3-9B1:  What value of series resistor would be needed to obtain a full scale deflection on a 50 microamp DC meter with an applied voltage of 200 volts DC?

4 megohms

3-9B2:  Which of the following Ohms Law formulas is incorrect?

I = R / E

3-9B3:  If a current of 2 amperes flows through a 50-ohm resistor, what is the voltage across the resistor?

100 volts

3-9B4:  If a 100-ohm resistor is connected across 200 volts, what is the current through the resistor?

2 amperes

3-9B5:  If a current of 3 amperes flows through a resistor connected to 90 volts, what is the resistance?

30 ohms

3-9B6:  A relay coil has 500 ohms resistance, and operatores on 125 mA.  What value of resistance should be connected in series with it to operate from 110 V DC?

380 ohms

3-10B1:  What is the peak-to-peak RF voltage on the 50 ohm output of a 100 watt transmitter?

200 volts

3-10B2:  What is the maximum DC or RMS voltage that may be connected across a 20 watt, 2000 ohm resistor?

200 volts

3-10B3:  A 500-ohm, 2-watt resistor and a 1500-ohm, 1-watt resistor are connected in parallel.  What is the maximum voltage that can be applied across the parallel circuit without exceeding wattage ratings?

31.6 volts

3-10B4:  In Figure 3B1, what is the voltage drop across R₁?

5 volts

3-10B5:  In Figure 3B2, what is the voltage drop across R₁?

9 volts

3-10B6:  What is the maximum rated current-carrying capacity of a resistor marked "2000 ohms, 200 watts?"

0.316 amps

3-11B1:  What is the most the actual transmit frequency could differ from a reading of 462,100,000 hertz on a frequency counter with a time base accuracy of +- 0.1 ppm?

46.21 Hz

3-11B2:  The second harmonic of a 380 kHz frequency is:

760 kHz

3-11B3:  What is the second harmonic of SSB frequency 4146 kHz?

8292 kHz

3-11B4:  What is the most the actual transmitter frequency could differ from a reading of 156,000,000 hertz on a frequency counter with a time base accuracy of +- 1.0 ppm?

156.52 Hz

3-11B5:  What is the most the actual transmitter frequency could differ from a readingof 156,520,000 hertz on a frequency counter with a time base accuracy of +- 10 ppm?

1565.20 Hz

3-11B6:  What is the most the actual transmitter frequency could differ from a reading of 462,100,000 hertz on a frequency counter with a time base accuracy of +- 1.0 ppm?

3-12B1:  At pi/3 radians, what is the amplitude of a sine-wave having a peak value of 5 volts?

+4.3 volts

3-12B2:  At 150 degrees, what is the amplitude of a sine-wave having a peak value of 5 volts?

+2.5 volts

3-12B3:  At 240 degrees, what is the amplitude of a sine-wave having a peak value of 5 volts?

-4.3 volts

3-12B4:  What is the equivalent to the root-mean-square value of an AC voltage?

The DC voltage causing the same heating in a given resistor as the RMS AC voltage of the same value

3-12B5:  What is the RMS value of a 340-volt peak-to-peak pure sine wave?

120 volts AC

B-12B6:  Determine the phase relationship between the two signals shown in Figure 3B3.

B is lagging A by 90 degrees

3-13B1:  What does the power factor equal in an R-L circuit having a 60 degree phase angle between the voltage and the current?

0.5

3-13B2:  If a resistance to which a constant voltage is applied is halved, what power dissipation will result?

Double

3-13B3:  746 watts, corresponding to the lifting of 550 pounds at the rate of one-foot-per-second, is the equvalent of how much horsepowe?

One horsepower

3-13B4:  In a circuit where the AC voltage and current are out of phase, how can the true power be determined?

By multiplying the apparent power times the power factor

3-13B5:  What does the power factor equal in an R-L circuit having a 45 degree phase angle between the voltage and the current?

0.707

3-13B6:  What does the power factor equal in an R-L circuit having a 30 degree phase angle between the voltage and the current?

0.866

3-14B1:  What is the term for the time required for the capacitor in a RC circuit to be charged to 63.2% of the supply voltage?

One time constant

3-14B2:  What is the meaning of the term "time constant of a RC circuit"?  The time required to charge the capacitor in the circuit to:

63.2% of the supply voltage

3-14B3:  What is the term for the time required for teh current in a RL circuit to build to 63.2% of the maximum value?

One time constant

3-14B4:  What is the meaning of the term "time constant of an RL circuit"?  The time required for the:

Current in the circuit to build up to 63.2% of the maximum value

3-14B5:  After two time constants, the capacitor in a RC circuit is charged to what percentage of the supply voltage?

86.5%

3-14B6:  After two time constants, the capacitor in a RC circuit is discharged to what percentage of the starting voltage?

13.5%

3-15B1:  What is the time constant of a circuit having two 220-microfarad capacitors and two 1-megaohm resistors all in parallel?

220 seconds

3-15B2:  What is the time constant of a circuit having two 100-microfarad capacitors and two 470-kilohm resistors all in series?

47 seconds

3-15B3:  What is the time constant of a circuit having a 100-microfarad capacitor and a 470-kilohm resistor in series?

47 seconds

3-15B4:  What is the time constant of a circuit having a 220-microfarad capacitor and a 1-megohm resistor in parallel?

220 seconds

3-15B5:  What is the time constant of a circuit having two 100-microfarad capacitors and two 470-kilohm resistors all in parallel?

47 seconds

3-15B6:  What is the time constant of a circuit having two 220-microfarad capacitors and two 1-megohm resistors all in series?

220 seconds

3-16B1:  What is the impedance of a network composed of a 0.1-microhenry inductor in series with a 20-ohm resistor, at 30 MHz?  Specify your answer in rectangular coordinates?

20 + j19

3-16B2:  In rectangular coordinates, what is the impedance of a network composed of a 0.1-microhenry inductor in series with a 30-ohm resistor, at 5 MHz?

30 + j3

3-16B3:  In rectangular coordinates, what is the impedance of a network composed of a 10-microhenry inductor in series with a 40-ohm resistor, at 500 MHz?

4 + j31400

3-16B4:  In rectangular coordinates, what is the impedance of a network composed of a 1.0-millihenry inductor in series with a 200-ohm resisitor, at 30 kHz?

200 + j188

3-16B5:  In rectangular coordinates, what is the impedance of a network composed of a 0.01-microfarad capacitor in parallel with a 300-ohm resistor, at 50 kHz?

159 - j150

3-16B6:  In rectangular coordinates, what is the impedance of a network composed of a 0.001-microfarad capacitor in series with a 400-ohm resistor, at 500 kHz?

400 - j318

3.-17B1:  What is the impedance of a network composed of a 100-picofarad capacitor in parallel with a 4000-ohm resistor, at 500 KHz?  Specify your answer in polar coordinates.

2490 ohms, | -51.5 degrees

3-17B2:  In polar coordinates, what is the impedance of a network composed of a 100-ohm-reactance inductor in series with a 100-ohm resistor?

141 ohms, |45 degrees

3-17B3:  In polar coordinates, what is the impedance of a network composed of a 400-ohm reactance capacitor in series with a 300-ohm resistor?

500 ohms, | -53.1 degrees

3-17B4:  In polar coordinates, what is the impedance of a network composed of a 300-ohm-reactance capacitor, a 600-ohm-reactance inductor, and a 400-ohm resistor, all connected in series?

500 ohms, |37 degrees

3-17B5:  In polar coordinates, what is the impedance of a network comprised of a 400-ohm-reactance inductor in parallel with a 300-ohm resistor?

240 ohms, |36.9 degrees

3-17B6:  Using the polar coordinate system, what visual respresentation would you get of a voltage in a sinewave circuit?

The plot shows the magnitude and phase angle

3-18B1:  What is the magnitude of the impedance of a series AC circuit having a resistance of 6 ohms, an inductive reactance of 17 ohms, and zero capacitive reactance?

18 ohms

3-18B2:  A 1-watt, 10-volt Zener diode with the following characteristics:  I_min = 5 mA; I_max = 95 mA; and Z = 8 ohms, is to be used as part of a voltage regulator in a 20-V power supply.  Approximately what size current-limiting resistor would be used to set its bias to the midpoint of its operating range?

200 ohms

3-18B3:  Given a power supply with a no load voltage of 12 volts and a full load voltage of 10 volts, what is the percentage of voltage regulation?

20 %

3-18B4:  What turns ratio does a transformer need in order to match a source impedance of 500 ohms to a load of 10 ohms?

7.1 to 1

3-18B5:  Given a power supply with a full load voltage of 200 volts and a regulation of 25%, what is the no load voltage?

250 volts

3-18B6:  What is the conductance (G) of a circuit if 6 amperes of current flows when 12 volts DC is applied?

0.50 Siemens (mhos)

3-19C1:  What happens to the conductivity of photoconductive material when light shines on it?

It increases

3-19C2:  What is the photoconductive effect?

The increased conductivity of an illuminated semiconductor junction

3-19C3:  What does the photoconductive effect in crystalline solids produce a noticeable change in?

The resistance of the solid

319C4:  What is the description of an optoisolator?

An LED and a photosensitive device

3-19C5:  What happens to the conductivity of a photosensitive semiconductor junction when it is illuminated?

The junction resistance decreases

3-19C6:  What is the description of an optocoupler?

An LED and a phtosensitive device

3-20C1:  What factors determine the capacitance of a capacitor?

Distance between the plates and the dielectric constant of the material between the plates

3-20C2:  In figure 3C4, if a small variable capacitor were installed in place of the dashed line, it would?

Decrease parasitic oscillations

3-20C3:  In Figure 3C4:  which component (labeled 1 through 4) is used to provide a signal ground?

2

3-20C4:  In Figure 3C5, which capacitor (labeled 1 though 4) is being used as a bypass capacitor?

3

3-20C5:  In Figure 3C5, the 1 uF capacitor is connected to a potentiometer that is used to:

Adjust tone

3-20C6:  What is the purpose of a coupling capacitor?

It blocks direct current and passes alternating current

3-1C1:  A capacitor is sometimes placed in series with the primary of a powe transformer to:

Improve the power factor

3-21C2:  A transformer used to step up its input voltage must have:

More turns of wire on its secondary than on its primary

3-21C3:  A transformer primary of 2250 turns connected to 120 VAC will develop what voltage across a 500-turn secondary?

26.7 volts

3-21C4:  What is the ratio of the output frequency to the input frequency of a single-phase full-wave rectifier?

2:1

3-21C5:  A power transformer has a single primary winding and three secondary windings producig 5.0 volts, 12.6 volts, and 150 volts.  Assuming similar wire sizes, which of the three secondary windings will have the highest measured DC resistance?

The 150 volt winding

3-21C6:  A power transformer has a primary winding of 200 turns of #24 wire and a secondary winding consisting of 500 turns of the same size wire.  When 20 volts are aplied to the primary winding, the expected secondary voltage will be:

50 volts

3-22C1:  In a linear electronic voltage regulator:

The conduction of a control element is varied in direct proportion to the line voltage or load current

3-22C2:  A switching electronic voltage regulator:

Switches the control device on and off, with the duty cycle proportional to the line or load conditions

3-22C3:  What device is usually used as a stable reference voltage in a linear voltage regulator?

Zener diode

3-22C4:  In a regulated power supply, what type of component will most likely be used to establish a reference voltage?

Zener Diode

3-22C5:  A three-terminal regulator:

Contains a voltage reference, error amplifier, sensing resistors and transistors, and a pass element

V.E.S.T.P.

3-22C6:  What is the range of voltage ratings available in Zener diodes?

2.4 volts to 200 volts and above

3-23C1:  How might two similar SCRs be connected to safely distribute the power load of a circuit?

In parallel, reverse polarity

3-23C2:  What are the three terminals of a SCR?

Anode, cathode, and gate

3-23C3:  Which of the following devices acts as two SCRs connected back to back, but facing in opposite directions and sharing a common gate?

TRIAC

(Transistor)

3-23C4:  What is the transistor called that is fabricated as two complementary SCRs in parallel with a common gate terminal?

TRIAC

3-23C5:  What are the three terminals of a TRIAC?

Gate, anode 1, and anode 2

3-23C6:  What circuit might contain a SCR?

A light-dimming circuit

3-24C1:  What is one common use for PIN diodes?

RF switch

3-24C2:  What is a common use of a hot-carrier diode?

VHF and UHF mmixers and detectors

3024C3:  Structurally, what are the two main categories of semiconductor diodes?

Junction and point contact

3-24C4:  What special type of diode is capable of both amplification and ocsillation?

Tunnel diodes

(Have negative resistance)

3-24C5:  What type of semiconductor diode varies its internal capacitance as the voltage applied to its terminals varies? 

Varactor diode

3-24C6:  What is the principal characteristic of a tunnel diode?

Negative resistance region

(Tunnel diode is used for Amplicfication and Oscillation)

3-25C1:  What is the meaning of the term "alpha" with regard to bipolar transistors?  The change of:

Collector current with respect to emitter current

(C.C.E.C.)

3-25C2:  What are the three terminals of a bipolar transistor?

Base, collector and emitter

3-25C3:  What is the meaning of the term "beta" with regard to bipolar transistors?  The change of:

Collector current with respect to base current

3-25C4:  What are the elements of a unijunction transistor?

Base 1, base 2, and emitter

3-25C5:  The beta cutoff frequency of a bipolar transistor is the frequency at which:

Emitter current gain has decreased to 0.707 of maximum

3-25C6:  What does it mean for a transistor to be fully saturated?

The collector current is at its maximum value

3-26C1:  A common base amplifier has:

More voltage gain than common emitter or common collector

3-26C2:  What does it mean for a transistor to be cut off?

There is no current between emitter and collector

3-26C3:  An emitter-follower amplifier has:

More current gain than common emitter or common base

3-26C4:  What conditions exits when a transistor is operating in saturation?

The base-emitter junction and collector-base junction are both forward biased

3-26C5:  For current to flow in an NPN silicon transistor's emitter-collector junction, the base must be:

At least 0.7 volts positive with respect to the emitter

3-6C6:  When an NPN transistor is operating as a Class A amplifier, the base-emitter junction

Is forward biased and the collector-base junction is reverse biased

3-27C1:  What type of bias is required for an LED to produce luminescence?

Forward bias

327C2:  What determines the visible color radiated by an LED junction?

The materials used to construct the deivce

3-37C4:  What is the approximate operating current of a light-emitting diode?

20 mA

3-27C4:  What would be the maximum current to safely illuminate a LED?

20 mA

3-27C5:  An LED facing a photodiode in a light-tight enclosure is commonly known as a/an:

Optoisolator

3-27C6:  What circuit component must be connected in series to protect an LED?

Series resistor

3-28C1:  What describes a diode junction that is forward biased?

It is a low impedance

3-28C2:  Why are special precautions necessary in handling FET and CMOS devices?

They are susceptible to damage from static charges

2-28C3:  What do the initials CMOS stand for?

Complementary metal-oxide semiconductor

3-28C4:  What is the piezoelectric effect?

Mechanical vibration of a crystal by the application of a voltage

2-28C5:  An electrical relay is a:

Remotely controlled switching device

3-28C6:  In which oscillator circuit would you find a quartz crystal?

Pierce