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### EEE :: Alternating Current and Voltage

1. If the rms voltage drop across a 15 k resistor is 16 V, the peak current through the resistor is

2.  A. 15 mA B. 1.5 mA C. 10 mA D. 1 mA

3. The conductive loop on the rotor of a simple two-pole, single-phase generator rotates at a rate of 400 rps. The frequency of the induced output voltage is

4.  A. 40 Hz B. 100 Hz C. 400 Hz D. indeterminable

5. How many degrees are there in /3 rad?

6.  A. 6° B. 60° C. 180° D. 27°

7. To produce an 800 Hz sine wave, a four-pole generator must be operated at

8.  A. 200 rps B. 400 rps C. 800 rps D. 1,600 rps

9. One sine wave has a positive-going zero crossing at 15° and another sine wave has a positive-going zero crossing at 55°. The phase angle between the two waveforms is

10.  A. 0° B. 45° C. 40° D. none of the above

11. If the rms current through a 4.7 k resistor is 4 mA, the peak voltage drop across the resistor is

12.  A. 4 V B. 18.8 V C. 26.6 V D. 2.66 V

13. A pulse waveform has a high time of 8 ms and a pulse width of 32 ms. The duty cycle is

14.  A. 25% B. 50% C. 1% D. 100%

15. A 20 kHz pulse waveform consists of pulses that are 15 s wide. The duty cycle

16.  A. is 1% B. is 30% C. is 100% D. cannot be determined

17. If the peak of a sine wave is 13 V, the peak-to-peak value is

18.  A. 6.5 V B. 13 V C. 26 V D. none of the above

19. A sinusoidal current has an rms value of 14 mA. The peak-to-peak value is

20.  A. 45.12 mA B. 16 mA C. 39.6 mA D. 22.6 mA