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Alternating Current and Voltage

Alternating Current and Voltage
The average value of a 12 V peak sine wave over one complete cycle is

0 V
6.37 V
1.27 V
7.64 V

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Alternating Current and Voltage
A sine wave with an rms value of 12 V is riding on a dc level of 18 V. The maximum value of the resulting waveform is

0 V
30 V
35 V
6 V

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

50%
1%
100%
25%

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Alternating Current and Voltage
To produce an 800 Hz sine wave, a four-pole generator must be operated at

1,600 rps
800 rps
400 rps
200 rps

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Alternating Current and Voltage
Sine wave A has a positive-going zero crossing at 45°. Sine wave B has a positive-going zero crossing at 60°. Which of the following statements is true?

Wave A leads wave B by 105°.
Wave A lags wave B by 105°.
Wave A lags wave B by 15°.
Wave A leads wave B by 15°.

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Alternating Current and Voltage
A sinusoidal current has an rms value of 14 mA. The peak-to-peak value is

39.6 mA
16 mA
45.12 mA
22.6 mA

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