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Alternating Current and Voltage

Alternating Current and Voltage
A 20 kHz pulse waveform consists of pulses that are 15 s wide. The duty cycle

is 1%
cannot be determined
is 100%
is 30%

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

6.37 V
14.14 V
25.48 V
50.96 V

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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

40°
0°
45°
None of these

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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

0 V
6 V
30 V
35 V

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Alternating Current and Voltage
Two series resistors are connected to an ac source. If there are 7.5 V rms across one resistor and 4.2 V rms across the other, the peak source voltage is

10.60 V
1.65 V
5.93 V
16.54 V

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Alternating Current and Voltage
The average value of a 12 V peak sine wave over one complete cycle is

0 V
6.37 V
1.27 V
7.64 V

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