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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

indeterminable
40 Hz
100 Hz
400 Hz

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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
400 rps
800 rps
200 rps

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

cannot be determined
is 1%
is 100%
is 30%

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

60°
27°
6°
180°

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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

6 V
35 V
0 V
30 V

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Alternating Current and Voltage
If a sine wave goes through 10 cycles in 20 s, the period is

100 s
4 s
20 s
2 s

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