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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 37hard

A 20 kHz pulse waveform consists of pulses that are 15 μs wide. The duty cycle

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Question 38easy

Increasing the number of turns in a conductor loop in a basic generator will ___.

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Question 39easy

Increasing the number of magnetic poles in a basic generator will ___.

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Question 40easy

The magnitude of an alternation that varies from zero is called its _______.

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Question 41easy

If a sine wave's frequency equals 25 MHz, its period equals _____.

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Question 42easy

If a sine wave's period equals 50 ms, its frequency equals _____.

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Question 43easy

A peak current of 12.5 mA is equivalent to ___.

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Question 44easy

All periodic frequencies are derived by combining higher frequency ______________ called harmonics.

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Question 45easy

An rms voltage of 5 V is equivalent to ___.

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