A permanent magnet moving coil (PMMC) DC ammeter cannot measure Alternating Current (AC) effectively because:

Question

Physics · Measuring Instruments

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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Correct answer

The average value of a complete AC cycle is zero, so the net deflection is zero.

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Answer 1

None of the above

Answer 2

Alternating current changes its direction too slowly.

Answer 3

The average value of a complete AC cycle is zero, so the net deflection is zero.

Answer 4

Alternating current cannot pass through the DC ammeter.

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