Question

Which of the following does not show the property of an alternating current?

• A. It reverses its direction periodically.
• B. Its frequency is 50Hz for households in India.
• C. AC can be transmitted over longer distances than DC.
• D. Its magnitude is constant.

Answer 1

The correct option is D Its magnitude is constant.

An alternating current is the one which changes its direction every $\frac{1}{100}$ second in Indian households and hence its frequency is 50 Hz. An advantage of the alternating current over direct current is that it can be transmitted over long distances without much loss of energy.