Assertion :Voltmeter is much better than a potentiometer for measuring emf of cell and Reason: A potentiometer draws no current while measuring emf of a cell.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is D Assertion is incorrect but Reason is correct
Potentiometer is much better instrument than voltmeter because there is heat loss in voltmeter due to its high resistance. As the potentiometer have its own resistance so it must draw current from circuit.

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