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Alternating Current and Voltage

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

33.33 kHz
5 kHz
50 kHz
500 kHz

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Alternating Current and Voltage
A sawtooth wave has a period of 10 ms. Its frequency is

10 Hz
50 Hz
100 Hz
1,000 Hz

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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
A sine wave with an rms value of 12 V is riding on a dc level of 18 V. The maximum value of the resulting waveform is

0 V
35 V
6 V
30 V

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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
12 cycles
1,200 cycles
120 cycles

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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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