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Alternating Current and Voltage

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

1.5 ms
0.0045 s
3,000 s
2 ms

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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
6.37 V
14.14 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

16.54 V
1.65 V
10.60 V
5.93 V

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

4 s
20 s
2 s
100 s

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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
26.6 V
18.8 V
2.66 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°
None of these
45°

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