Alternating current can not be measured by D.C. ammeter because (a) Average value of current for complete cycle is zero (b) A.C. Changes direction (c) A.C. can not pass through D.C. Ammeter (d) D.C. Ammeter will get damaged.

Answer: (a). A D.C. ammeter's deflection is proportional to the average current. For a complete cycle of AC the average current is zero, so it shows no reading. So the answer is (a).

Alternating current can not be measured by D.C. ammeter because | JEE Main 2004 (AIEEE)

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AC Basics: Peak, RMS & Average Values

Alternating current can not be measured by $\text{D.C.}$ ammeter because

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Answer: (a)

A D.C. ammeter's deflection is proportional to the average current.
For a complete cycle of AC the average current is zero, so it shows no reading.
So the answer is (a).

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