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In a potentiometer of 10 wires, the bala...

In a potentiometer of 10 wires, the balance point is obtained on the 6th wire. To shift the balance point to 8th wire, we should :

A

increase resistance in the main circuit

B

decrease resistance in the main circuit

C

increase resistance in series with the cell whose emf is to be measured

D

decrease resistance in series with the cell whose emf is to be measured.

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