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Alternating Current and Voltage

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

6°
60°
27°
180°

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

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

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Alternating Current and Voltage
A square wave has a period of 60 s. The first odd harmonic is

50 kHz
33.33 kHz
500 kHz
5 kHz

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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
16.54 V
5.93 V
1.65 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

50%
1%
100%
25%

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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 30%
is 100%
is 1%

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