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Alternating Current and Voltage

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

25.48 V
50.96 V
14.14 V
6.37 V

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

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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

1.6 V
4.6 V
4 V
11 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

45.12 mA
16 mA
22.6 mA
39.6 mA

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Alternating Current and Voltage
If the rms current through a 4.7 k resistor is 4 mA, the peak voltage drop across the resistor is

4 V
18.8 V
2.66 V
26.6 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

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

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