1.

Which of the circuits shown below is best suited to measure the resistance of a coil, R? The symbols have their usual meanings. The ammeter has a finite resistance. The voltmeter is ideal.

Answer»

Correct Answer is: (d)

The voltmeter must measure the potential difference across the coil only. This is satisfied in (b) and (d). However, in (b) the key is not correctly placed.



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