MHT CET Physics question

Alternating current cannot be measured by DC ammeter because

(A)AC cannot pass through DC ammeter
(B)AC changes direction
(C)average value of current for complete cycle is zeroCorrect
(D)DC ammeter will get damaged

Answer: (C)

Solution

A DC (moving-coil) ammeter reads the average current; over a complete cycle the average of AC is zero, so the pointer shows no steady deflection. AC does

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Question ID VK-082356