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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
400 Hz
100 Hz
40 Hz

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

400 rps
200 rps
1,600 rps
800 rps

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Alternating Current and Voltage
When a sine wave has a frequency of 100 Hz in 12 s it goes through

1,200 cycles
120 cycles
12 cycles
1/100 cycle

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

2 s
20 s
4 s
100 s

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

6°
27°
60°
180°

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