Question

In general in an alternating current circuit (one complete cycle) which of the following is possible :

• A. The average value of current is zero
• B. The average value of square of the current is zero
• C. Average power dissipation is zero
• D. The phase difference between voltage and current is zero

Answer 1

The correct option is A The average value of current is zero

The average value of current can be zero because all positive and negative currents can cancel each other.

The average value of square of the current cannot be zero because after squaring the currents all becomes positive and cannot cancel each other.

Average power dissipation and phase difference between voltage and current cannot be zero.