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Which of the following devices is the more accurate one for the measurement of emf?

Which of the following devices is the more accurate one for the measurement of emf? Correct Answer Potentiometer

Potentiometer is the more accurate device to measure emf than the other ones such as multimeter or voltmeter. Potentiometer is highly sensitive and thus, even small emfs can be measured using this device. Moreover, potentiometers do not draw current from the circuit during measurements, like voltmeters.

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