Alternating current is one which changes in its :

direction

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magnitude

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magnitude and direction both

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none

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Solution

The correct option is C magnitude and direction both
Answer is C.
An alternating current (AC) is an electric current whose magnitude and direction vary, unlike direct current, whose direction remains constant.

The usual waveform of an AC power circuit is a sine wave, because this leads to the most efficient transmission of energy. The sine wave oscillates periodically between positive and negative direction.

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