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Alternating Current and Voltage

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
30 V
0 V

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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

40 Hz
100 Hz
indeterminable
400 Hz

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

180°
60°
27°
6°

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

200 rps
400 rps
800 rps
1,600 rps

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Alternating Current and Voltage
A sine wave of 15 kHz is changing at a faster rate than a sine wave with a frequency of

12 kHz
25 kHz
1.3 MHz
18 kHz

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

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