It is required to measure the true open circuit e.m.f. of a battery. The best device is Options: A . &nbspD.C. voltmeter B . &nbspAmmeter and a known resistance C . &nbspD.'potentiometer D . &nbspNone of the above

It is required to measure the true open circuit e.m.f. of a battery. The best de

Question

It is required to measure the true open circuit e.m.f. of a battery. The best device is

Options:

A . D.C. voltmeter

B . Ammeter and a known resistance

C . D.'potentiometer

D . None of the above

Answer: Option C

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