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Alternating Current and Voltage

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°
None of these
45°
0°

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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

35 V
6 V
30 V
0 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
10.60 V
5.93 V
1.65 V

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Alternating Current and Voltage
A sawtooth wave has a period of 10 ms. Its frequency is

1,000 Hz
50 Hz
100 Hz
10 Hz

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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

18.8 V
26.6 V
2.66 V
4 V

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Alternating Current and Voltage
A pulse waveform has a high time of 8 ms and a pulse width of 32 ms. The duty cycle is

100%
1%
50%
25%

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