Question

Alternating current can not be measured by dc ammeter because.

• A. Average value of current for complete cycle is zero
• B. Ac changes direction
• C. Ac can not pass through dc ammeter
• D. Dc ammeter will get damaged

Answer 1

The correct option is A Average value of current for complete cycle is zero

The full cycle of ac current consists of two half cycles currently is positive and second half current is negative therefore ac value of the current average out to zero the half cycle current value is different at different points and so that ac can be measured by dc ammeter