5 In a potentiometer the null point is received at 7th wire If now we...

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5 In a potentiometer the null point is received at 7th wire If now we have to change the null point at the 9th wire what should we do 1 Attach resistance in series with cell of secondary circuit 2 Increase resistance in main circuit 3 Decrease resistance in main circuit 4 Decrease applied emf

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