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Alternating Current and Voltage

Alternating Current and Voltage
A waveform has a baseline of 3 V, a duty cycle of 20%, and an amplitude of 8 V. The average voltage value is

11 V
4 V
4.6 V
1.6 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
400 Hz
indeterminable

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

100 s
20 s
2 s
4 s

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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
0 V
6 V
30 V

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

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

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Alternating Current and Voltage
One sine wave has a positive-going zero crossing at 15° and another sine wave has a positive-going zero crossing at 55°. The phase angle between the two waveforms is

45°
0°
None of these
40°

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