MCQ
Alternating current is one which changes in its:
- Adirection
- Bmagnitude
- ✓magnitude and direction both
- Dnone
✓
Answer
Correct option: C.
magnitude and direction both
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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