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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 `7^(th)`. To shift the balance point to `9^(th)` wire, we should

A

decrease resistance in the main circuit.

B

increase resistance in the main circuit.

C

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

D

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

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