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60 Cards in this Set
- Front
- Back
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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 megaohms
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3-9B2
Which of the following Ohms law formulas is incorrect? |
I = R / E
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3-9B3
If a current of 2 amperes flows through a 50-ohm resistor, what is the voltage across the resistor? |
100 volts
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3-9B4
If a 100-ohm resistor is connected across 200 volts, what is the current through the resistor? |
2 amperes
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3-9B5
If a current 0f 3 amperes flows through a resistor connected to 90 volts, what is the resistance? |
30 ohms
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3-9B6
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
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3-10B1
What is the peak-to-peak RF voltage on the 50 ohm output of a 100 watt transmitter? |
200 volts
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3-10B2
What is the maximum DC or RMS voltage that may be connected across a 20 watt, 2000 ohm resistor? |
200 volts
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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
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3-10B4
In figure 3B1, what is the voltage drop across R1? |
5 volts
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3-10B5
In figure 3B2, what is the voltage drop across R1? |
9 volts
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3-10B6
What is the maximum rated current carrying capacity of a resistor marked "2000 ohms, 200 watts"? |
0.316 amperes
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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
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3-11B2
The second harmonic of a 380 kHz frequncy is: |
760 kHz
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3-11B3
What is the second harmonic for SSB frequency4146 kHz? |
8292 kHz
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3-11B4
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
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3-11B5
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
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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? |
462.1 Hz
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3-12B1
At pi/3 radians, what is the amplitude of a sine wave having a peak value of 5 volts? |
+4.3 volts
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3-12B2
At 150 degrees, what is the amplitude of a sine wave having a peak value of 5 volts? |
+2.5 volts
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3-12B3
At 240 degrees, what is the amplitude of a sine wave having a peak value of 5 volts? |
-4.3 volts
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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
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3-12B5
What is RMS value of a 340 volt peak-to-peak pure sine wave? |
120 volts AC
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3-12B6
Determine the phase relationship between the two signal shown in figure 3B3. |
B is lagging A by 90 degrees
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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
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3-13B2
If a resistance to which a constant voltage is applied is halved, what power dissipation will result? |
Double
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3-13B3
746 watts, coorsponding to the lifting of 550 pounds at the rate of one-foot-per-second, is the equivalent of how much horsepower? |
One horsepower
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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
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3-13B5
What oes the power factor equal in an R-L circuit having 45 degrees phase angle between the voltage and the current? |
0.707
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3-18B6
What does the power factor equal in an R-L circuit having 30 degree phase angle between the voltage and the current? |
0.866
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3-14B1
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
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3-14B2
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
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3-14B3
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
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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
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3-14B5
After two time constants, the capacitor in an RC circuit is charged to what percentage of the supply voltage? |
86.5 %
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3-14B6
After two time constants, the capacitor in an RC circuit is discharged to what percentage of the starting voltage? |
13.5 %
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3-15B1
What is the time constant of a circuit having two 220-microfarad capacitors and two 1-megohm resistors all in parallel? |
220 seconds
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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
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3-15B3
What is the time constant of a circuit having a 100-microfarad capacitor and a 470-kilohm resistor in series? |
47 seconds
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3-15B4
What is the time constant of a circuit having a 220-microfarad capacitor and a 1-megohm resistor in parallel? |
220 seconds
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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
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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
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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
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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
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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? |
40 +j31400
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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 resistor, at 30 kHz? |
200 + j188
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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
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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
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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
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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
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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
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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
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3-17B5In polar coordinates, what is the impedance of a network comprised of a 400-ohm-reactance inductor in parallel with a 300-ohm resistor?
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240 ohms, /36.9 degrees
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3-17B6
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
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3-18B
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
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3-18B2
A 1-watt, 10-volt 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 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
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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 %
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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
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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
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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)
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