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60 Cards in this Set
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39B1
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 megaohms


39B2
Which of the following Ohms law formulas is incorrect? 
I = R / E


39B3
If a current of 2 amperes flows through a 50ohm resistor, what is the voltage across the resistor? 
100 volts


39B4
If a 100ohm resistor is connected across 200 volts, what is the current through the resistor? 
2 amperes


39B5
If a current 0f 3 amperes flows through a resistor connected to 90 volts, what is the resistance? 
30 ohms


39B6
A relay coil has 500 ohms resistance, and operates on a 125 mA. What value of resistance should be connected in series with it to operate from 110 V DC? 
380 ohms


310B1
What is the peaktopeak RF voltage on the 50 ohm output of a 100 watt transmitter? 
200 volts


310B2
What is the maximum DC or RMS voltage that may be connected across a 20 watt, 2000 ohm resistor? 
200 volts


310B3
A 500ohm, 2watt resistor and a 1500ohm, 1watt 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


310B4
In figure 3B1, what is the voltage drop across R1? 
5 volts


310B5
In figure 3B2, what is the voltage drop across R1? 
9 volts


310B6
What is the maximum rated current carrying capacity of a resistor marked "2000 ohms, 200 watts"? 
0.316 amperes


311B1
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


311B2
The second harmonic of a 380 kHz frequncy is: 
760 kHz


311B3
What is the second harmonic for SSB frequency4146 kHz? 
8292 kHz


311B4
What is the most the actual transmitter frequency could differ from a reading of 156,520,000 Hertz on a frequency counter with a time base accuracy of ± 1.0 ppm? 
156.52 Hz


311B5
What is the most the actual transmitter frequency could differ from a reading of 156,520,000 Hertz on a frequency counter with a time base accuracy of +/ 10 ppm? 
1565.2 Hz


311B6
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? 
462.1 Hz


312B1
At pi/3 radians, what is the amplitude of a sine wave having a peak value of 5 volts? 
+4.3 volts


312B2
At 150 degrees, what is the amplitude of a sine wave having a peak value of 5 volts? 
+2.5 volts


312B3
At 240 degrees, what is the amplitude of a sine wave having a peak value of 5 volts? 
4.3 volts


312B4
What is the equivalent to the rootmeansquare 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


312B5
What is RMS value of a 340 volt peaktopeak pure sine wave? 
120 volts AC


312B6
Determine the phase relationship between the two signal shown in figure 3B3. 
B is lagging A by 90 degrees


313B1
What does the power factor equal in an RL circuit having a 60 degree phase angle between the voltage and the current? 
0.5


313B2
If a resistance to which a constant voltage is applied is halved, what power dissipation will result? 
Double


313B3
746 watts, coorsponding to the lifting of 550 pounds at the rate of onefootpersecond, is the equivalent of how much horsepower? 
One horsepower


313B4
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


313B5
What oes the power factor equal in an RL circuit having 45 degrees phase angle between the voltage and the current? 
0.707


318B6
What does the power factor equal in an RL circuit having 30 degree phase angle between the voltage and the current? 
0.866


314B1
What is the term for the time required for the capacitor in an RC circuit to be changed to 63.2% of the supply voltage? 
One time constant


314B2
What is the meaning of the term “time constant of an RC circuit”? The time required to charge the capacitor in the circuit to: 
63.2% of the supply voltage


314B3
What is the term for the time required for the current in an RL circuit to build up to 63.2% of the maximum value? 
One time constant


314B4
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


314B5
After two time constants, the capacitor in an RC circuit is charged to what percentage of the supply voltage? 
86.5 %


314B6
After two time constants, the capacitor in an RC circuit is discharged to what percentage of the starting voltage? 
13.5 %


315B1
What is the time constant of a circuit having two 220microfarad capacitors and two 1megohm resistors all in parallel? 
220 seconds


315B2
What is the time constant of a circuit having two 100microfarad capacitors and two 470kilohm resistors all in series? 
47 seconds


315B3
What is the time constant of a circuit having a 100microfarad capacitor and a 470kilohm resistor in series? 
47 seconds


315B4
What is the time constant of a circuit having a 220microfarad capacitor and a 1megohm resistor in parallel? 
220 seconds


315B5
What is the time constant of a circuit having two 100microfarad capacitors and two 470kilohm resistors all in parallel? 
47 seconds


315B6
What is the time constant of a circuit having two 220microfarad capacitors and two 1megohm resistors all in series? 
220 seconds


316B1
What is the impedance of a network composed of a 0.1microhenry inductor in series with a 20ohm resistor, at 30 MHz? Specify your answer in rectangular coordinates. 
20 +j19


316B2
In rectangular coordinates, what is the impedance of a network composed of a 0.1microhenry inductor in series with a 30ohm resistor, at 5 MHz? 
30 +j3


316B3
In rectangular coordinates, what is the impedance of a network composed of a 10microhenry inductor in series with a 40ohm resistor, at 500 MHz? 
40 +j31400


316B4
In rectangular coordinates, what is the impedance of a network composed of a 1.0millihenry inductor in series with a 200ohm resistor, at 30 kHz? 
200 + j188


316B5
In rectangular coordinates, what is the impedance of a network composed of a 0.01microfarad capacitor in parallel with a 300ohm resistor, at 50 kHz? 
159  j150


316B6
In rectangular coordinates, what is the impedance of a network composed of a 0.001microfarad capacitor in series with a 400ohm resistor, at 500 kHz? 
400  j318


317B1
What is the impedance of a network composed of a 100picofarad capacitor in parallel with a 4000ohm resistor, at 500 KHz? Specify your answer in polar coordinates. 
2490 ohms, /51.5 degrees


317B2
In polar coordinates, what is the impedance of a network composed of a 100ohmreactance inductor in series with a 100ohm resistor? 
141 ohms, /45 degrees


317B3
In polar coordinates, what is the impedance of a network composed of a 400ohmreactance capacitor in series with a 300ohm resistor? 
500 ohms, /53.1 degrees


317B4
In polar coordinates, what is the impedance of a network composed of a 300ohmreactance capacitor, a 600ohmreactance inductor, and a 400ohm resistor, all connected in series? 
500 ohms, /37 degrees


317B5In polar coordinates, what is the impedance of a network comprised of a 400ohmreactance inductor in parallel with a 300ohm resistor?

240 ohms, /36.9 degrees


317B6
Using the polar coordinate system, what visual representation would you get of a voltage in a sinewave circuit? 
The plot shows the magnitude and phase angle


318B
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


318B2
A 1watt, 10volt Zener diode with the following characteristics: Imin. = 5 mA; Imax. = 95 mA; and Z = 8 ohms, is to be used as part of a voltage regulator in a 20V power supply. Approximately what size currentlimiting resistor would be used to set its bias to the midpoint of its operating range? 
200 ohms


318B3
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 %


318B4
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


318B5
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


318B6
What is the conductance (G) of a circuit if 6 amperes of current flows when 12 volts DC is applied? 
0.50 Siemens (mhos)
