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Alternating Current and Voltage

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

8 V
5.44 V
54.4 V
7.07 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°
45°
None of these
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
25.48 V
6.37 V

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Alternating Current and Voltage
A sine wave of 15 kHz is changing at a faster rate than a sine wave with a frequency of

12 kHz
25 kHz
18 kHz
1.3 MHz

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

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

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Alternating Current and Voltage
A phasor represents

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

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