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Alternating Current and Voltage

Alternating Current and Voltage
When a sine wave has a frequency of 100 Hz in 12 s it goes through

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

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Alternating Current and Voltage
If the rms voltage drop across a 15 k resistor is 16 V, the peak current through the resistor is

10 mA
1.5 mA
1 mA
15 mA

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

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

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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

None of these
45°
0°
40°

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

50.96 V
14.14 V
6.37 V
25.48 V

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Alternating Current and Voltage
To produce an 800 Hz sine wave, a four-pole generator must be operated at

800 rps
400 rps
1,600 rps
200 rps

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