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In a potentiometer experiment, to measur...

In a potentiometer experiment, to measure the e.m.f. of a cell, the potentiometer consists of six wires each of length 100 cm. The null point is obtained on the third wire. If we want to shift the null point to the 5th wire, then we should

A

increase the resistance in the main circuit

B

decrease the resistance in the main circuit

C

increase the resistance in series with the cell, whose e.m.f. is to be measured

D

decrease the resistacne in series with the cell, whose e.m.f. is to be measured

Text Solution

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The correct Answer is:
A
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