JEE PHYSICS MCQ: CURRENT ELECTRICITY

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In comparing e.m.f. of two cells with the help of a potentiometer,if the balance point is to be shifted to a longer length of the wire, then this can be done by

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Correct option: D

Decreasing the current from the main circuit

Option D (Decreasing the current from the main circuit) is correct because decreasing the main circuit current reduces the potential gradient, requiring a longer length for the same potential difference.

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