Which of the following instruments can be used to measure AC current only? a) Permanent Magnet Type ammeter b) Induction type ammeter c) Moving iron voltmeter d) Moving iron ammeter

Which of the following instruments can be used to measure AC current only?

a) Permanent Magnet Type ammeter

b) Induction type ammeter

c) Moving iron voltmeter

d) Moving iron ammeter
1). D only
2). B only
3). A, B, D
4). B and D only

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