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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

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

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Alternating Current and Voltage
If a sine wave goes through 10 cycles in 20 s, the period is

20 s
100 s
2 s
4 s

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Alternating Current and Voltage
A phasor represents

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

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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

1.5 mA
1 mA
10 mA
15 mA

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Alternating Current and Voltage
If the rms current through a 4.7 k resistor is 4 mA, the peak voltage drop across the resistor is

4 V
2.66 V
18.8 V
26.6 V

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Alternating Current and Voltage
The conductive loop on the rotor of a simple two-pole, single-phase generator rotates at a rate of 400 rps. The frequency of the induced output voltage is

40 Hz
400 Hz
100 Hz
indeterminable

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