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Alternating Current and Voltage

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

60°
180°
6°
27°

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

6.5 V
26 V
13 V
None of these

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

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

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Alternating Current and Voltage
A phasor represents

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

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

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Alternating Current and Voltage
A sine wave with a period of 4 ms is changing at a faster rate than a sine wave with a period of

3,000 s
2 ms
0.0045 s
1.5 ms

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