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Alternating Current and Voltage

Alternating Current and Voltage
If a sine wave goes through 10 cycles in 20 s, the period is

4 s
2 s
100 s
20 s

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

27°
60°
180°
6°

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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
0.0045 s
1.5 ms
2 ms

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

1.27 V
0 V
7.64 V
6.37 V

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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

2.66 V
26.6 V
18.8 V
4 V

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

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

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