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Alternating Current and Voltage

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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Alternating Current and Voltage
A phasor represents

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

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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

2 ms
0.0045 s
3,000 s
1.5 ms

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Alternating Current and Voltage
If the rms current through a 6.8 k resistor is 8 mA, the rms voltage drop across the resistor is

54.4 V
7.07 V
5.44 V
8 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

None of these
40°
45°
0°

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Alternating Current and Voltage
A waveform has a baseline of 3 V, a duty cycle of 20%, and an amplitude of 8 V. The average voltage value is

11 V
4 V
1.6 V
4.6 V

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