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Alternating Current and Voltage

Alternating Current and Voltage
A phasor represents

the width of a quantity
the magnitude of a quantity
the phase angle
the magnitude and a quantity direction

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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
12 cycles
120 cycles
1/100 cycle

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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
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°
40°
None of these

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Alternating Current and Voltage
If the peak of a sine wave is 13 V, the peak-to-peak value is

13 V
None of these
26 V
6.5 V

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Alternating Current and Voltage
The average half-cycle value of a sine wave with a 40 V peak is

14.14 V
6.37 V
50.96 V
25.48 V

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