# Shared Flashcard Set

## Details

TKT Study Flash Cards
TKT Study
54
Engineering
Professional
09/17/2008

Term
 convert MilliAmperes to Amperes
Definition
 Milliampers divided by 10 = Amperes
Term
 Convert Ohms to Kilohms
Definition
 Ohms divided by 1000
Term
 Ohm's Law Formula for finding Power
Definition
 Calculate Amps I=V/RThen Calculate Watts W=VxI
Term
 Capacitive Reactance does what with frequency
Definition
 decreases with increasing frequency
Term
 Ohm's Law Triangle for Voltage
Definition
 V I RTo find Voltage cover the V with your finger and fill in values for I(amps) and R(resistance) V = I x R
Term
 Ohm's Law Triangle for Amperes or Ammeters
Definition
 V I RCover I (amps) with finger and find the values for V(volts) and R (resistance)Formula I = V/R
Term
 Ohm's Law for finding Resistance
Definition
 V I Rto find resistance cover R with your finger and find values for Volts (v) and Ampes (I)Formula is R = V/I
Term
 Easy way to remember Ohm's Law
Definition
 Find Value's (what values are given)Find Equation (determine which equation will be used)Find Numbers (do the math)Very Easy Now
Term
 What is the Basic Unit of Resistance
Definition
 The Ohm
Term
 How to calculate voltage drop across series resistors.
Definition
 Step 1: Determine Current of total resistors across the series.(I = Current/V=Voltage/R(t)=Resistance Total)I = V / R(t)I = 9 / (2k + 5k + 10K)I = .53 mAStep 2: Now that we have the Current across the resistors we can calculate the voltage across EACH resistor.I = CurrentVx=Voltage (x=Current Value across X Resistor)Rx=Resistor value(x=resistor#)V = I x RxV1 = .53 mA x 2kV1 = 1.06VV2 = .53 mA x 5kV2 = 2.65V3 = .53 mA x 10kV3 = 5.3VV1 + V2 + V3 = 9.01 (voltage is 9V only 9.01 because i rounded up from .529 to .53) At .529 you can see barely a difference:V1=1.058VV2=2.645VV3=5.290VV Total= 8.993VAlso If the resistors are all the same value its easier.
Term
 In a A/C circuit, if the power factor equals .5, then the __________power is one half the ____________power.
Definition
 true/apparent
Term
 Resistance Total Fact
Definition
 The total resistance will always be lower than that of the smallest resistor.
Term
 How to Find resistance Total in parallel circuit if Ohms are provided.
Definition
 Divide all R(ohms) by 1 then add them together. Example 1/ (1/120 + 1/82 + 1/270 + 1/180) this approximates to.....1/ (0.0083 + 0.0122 + 0.0037 + 0.0056) which becomes...1/ 0.0298 giving us .....Total R = 33.6 OhmsAlways Round!
Term
 value of current in the circuit
Definition
 Find the Resistance Total First then divide by Voltage.* note * divide all Ohms by 1 then add together. Then apply Ohms Law I = V/RExample V =28 R1=4, R2=4, R3=6R1=1/4 = 0.25R2=1/4 = 0.25R3=1/6 = 0.160.25 + 0.25 + 0.16 = 0.66vI = 28/0.66 = .02(I)
Term
 In a RCL circuit the phase difference between voltage and current is
Definition
 Less than 90 degrees between voltage and current.
Term
 Formula to convert Volts to Kilovolts(kv)
Definition
 Kilo = 1000 Take Volts and divide by 1000v/1000
Term
 electrical door bell has a resistance of 70 ohms and requires a current of 2 Amps, the voltage necessary to operate the bell is
Definition
 Ohm's Law Formula would be V=I*RV=2*70 V=140Answer in KV is .14 which is v/1000
Term
 The A/C voltage across a pure inductance is said to
Definition
 be in phase with the current
Term
 two materials most commonly used in the manufacture of transistors are:
Definition
 germanium and silicon
Term
 Formula to find Total Resistance if all have the same value.
Definition
 Rt = R/NR is the Value of each resistor.N is the Number of Resistors.
Term
 Formula to find resistance if two resistors have different values.
Definition
 Rt = R1 X R2 divided by R1 + R2
Term
 total resistance of parallel circuit with three or more resistors
Definition
 Rt = 1 divided by 1/R1 + 1/R2 + 1/R3 etc
Term
 One micro-henry is
Definition
 The SI prefix "micro" represents a factor of 10-6, or in scientific notation, 1E-6.So 1 microHenry = 10-6 Henry.or .000001 h
Term
 How to find Ammeter in the circuit
Definition
 Ohm's Law Formula should be I = V/R
Term
 impedance of an A/C circuit is equal to
Definition
 the total opposition to current flow
Term
 How to find total current in circuit
Definition
 we have to find out the total voltage ,then resistance then finally you can find out the current
Term
 A current that continually changes in amount and periodically changes it’s direction is called:
Definition
 alternating current
Term
 in a Series Circuit how do you find total voltage?
Definition
 The total voltage is the sum of the voltage on each component.
Term
 how to find total resistance in a series circuit?
Definition
 The total resistance is equal to the sum of the resistance on each component.
Term
 A NIBBLE is?
Definition
 4 bits or half a byte
Term
 A kilo-bit is equal to
Definition
 equal to 1000 bits
Term
 A rectifier:
Definition
 converts D/C to A/C
Term
 The logic circuitry that allows a computer to communicate with the outside world is know as the
Definition
 I/O input/output
Term
 The unit that performs arithmetic and logic operations is the
Definition
 ALU - Arithmetic Logic Unit
Term
 What is a Digial Multimeter
Definition
 Used to mesaure the voltage, current, or resistance in an electric circuit
Term
 What is an Oscilloscope
Definition
 To View and Measure AC waveforms.
Term
 A Volt is a measure of what?
Definition
 Electromotive Force
Term
 When applied frequency is increased in a circuit containing both an inductor and a capacitor what happens.
Definition
 inductive reactance increases
Term
 200 Micro Farads is the same as
Definition
Term
 The DC resistance of a conductor is determined by
Definition
 The length, Thickness and temperature
Term
 Voltage Drop Fact
Definition
 The sum of all of the voltage drops in a circuit always equals the supply voltage, such as the battery voltage.
Term
 How to find voltage drop on a complex circuit. both parallel and series.
Definition
 First find total resistance of the parallel circuits (R1 xR2) / (R1+ R2) = Rt. Add that to the ohm in the series and it equals the total ohms. Now find total current using I=V/R. I = V/R. So I = 70 volts/70 ohms = 1 amp. Now calculate voltage drop using V = I x R So V of R1 = 1 amp x 57 ohms = 57 volts.
Term
 convert milliamps to amps
Definition
 take milliamps and divide by 1000
Term
 Definition of Voltage
Definition
 Electrical tension (or voltage after its SI unit, the volt) is the difference of electrical potential between two points of an electrical or electronic circuit, expressed in volts. It is the measurement of the potential for an electric field to cause an electric current in an electrical conductor.
Term
 An attenuator is
Definition
 An attenuator is an electronic device that reduces the amplitude or power of a signal without appreciably distorting its waveform.An attenuator is effectively the opposite of an amplifier, though the two work by different methods. While an amplifier provides gain, an attenuator provides loss, or gain less than 1.
Term
 software includes what types of things
Definition
 programs, routines, symbolic languages all of the above.
Term
 How many time constants are required to charge a capacitor to 100% of the source voltage.
Definition
 6
Term
 High speed data transmission would be done as
Definition
 Synchronous transmission
Term
 a device that increases measured loss in a circuit is called a
Definition
Term
 A circle on a flow chart indicates
Definition
 A start piont
Term
 A resonant A/C circuit offers what?
Definition
 Minimum impedance to current flow.
Term
 A rate of electron flow in a circuit is expressed in units called what?
Definition
 Amperes or Amps
Term
 Convert Milli amperes to AMperes
Definition
 take milliamps and divide by 1000
Term
 To find voltage when ohms and amps are provided
Definition
 v=I x R example 70ohms requires current of 2amps. find voltage. v=2X70=140 then to convert to KV 140/1000 = .14kv
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