A student finds the balancing length to be 'l' with a cell of constant emf in the secondary circuit. Another student connects the same cell in the secondary circuit of potentiometer of double the length but with a cell of half the emf in the primary circuit. The balancing length will be [cell in primary is ideal and no series resistance is present in primary circuit.]

A student finds the balancing length to be 'l' with a cell of constant

1.	A student finds the balancing length to be 'l' with a cell of constant emf in the secondary circuit. Another student connects the same cell in the secondary circuit of potentiometer of double the length but with a cell of half the emf in the primary circuit. The balancing length will be [cell in primary is ideal and no series resistance is present in primary circuit.]
Answer» `4L` `l//4` `2L` `l//2` ANSWER :A

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