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Alternating Current and Voltage

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
1/100 cycle
120 cycles

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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

1.3 MHz
18 kHz
25 kHz
12 kHz

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

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

26 V
6.5 V
None of these
13 V

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Alternating Current and Voltage
A sinusoidal current has an rms value of 14 mA. The peak-to-peak value is

39.6 mA
22.6 mA
45.12 mA
16 mA

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