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Alternating current can not be measured ...

Alternating current can not be measured by D.C. Ammeter because

A

AC cannot pass through DC ammeter

B

average value of current in complete cycle is zero

C

AC is virtual

D

AC changes its direction

Text Solution

Verified by Experts

The correct Answer is:
B
In DC ammeter, a coil is free to rotate in the magnetic field of a fixed magnet. If an alternating current is passed through such a coil, the torque will reverse its direction of current each time changes and the average value of the torque will be zero.
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