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Alternating Current and Voltage MCQs

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Practice free Alternating Current and Voltage multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 45 questions — no login required.

Question 19hard

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

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Question 20hard

Average value of a sine wave is 0.707 times the peak value.

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Question 21hard

A square wave has a period of 60 μs. The first odd harmonic is

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Question 22hard

Periodic is characterized by a repetition at fixed time intervals.

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Question 23hard

The designation rms means repetitions measured per second.

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Question 24hard

A saw-tooth wave has a period of 10 ms. Its frequency is

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Question 25hard

The average value of a 12 V peak sine wave over one complete cycle is

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Question 26hard

The duty cycle of a pulse waveform with a pulse width of 10 μs and a period of 100 μs is 25%.

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Question 27hard

If the rms voltage drop across a 15 kΩ resistor is 16 V, the peak current through the resistor is

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