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Alternating Current and Voltage

Alternating Current and Voltage
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

100 Hz
indeterminable
40 Hz
400 Hz

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Alternating Current and Voltage
How many degrees are there in /3 rad?

6°
27°
180°
60°

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

6.37 V
0 V
7.64 V
1.27 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

35 V
30 V
6 V
0 V

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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 lags wave B by 105°.
Wave A leads 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
Two series resistors are connected to an ac source. If there are 7.5 V rms across one resistor and 4.2 V rms across the other, the peak source voltage is

1.65 V
16.54 V
10.60 V
5.93 V

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