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Alternating Current and Voltage

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

27°
60°
6°
180°

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Alternating Current and Voltage
A signal with a 400 s period has a frequency of

250 Hz
400 Hz
25,000 Hz
2,500 Hz

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Alternating Current and Voltage
A sinusoidal current has an rms value of 14 mA. The peak-to-peak value is

45.12 mA
16 mA
39.6 mA
22.6 mA

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Alternating Current and Voltage
A phasor represents

the magnitude and a quantity direction
the phase angle
the width of a quantity
the magnitude of a quantity

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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
5.93 V
10.60 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

0°
40°
45°
None of these

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