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1 A cell of emf E in the secondary circuit gives null deflection for 1...

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1 A cell of emf E in the secondary circuit gives null deflection for 1 5 m length of potentiometer of wire length 10 m If another cell of emf E2 is connected in series with E then the null deflection was obtained for 2 5 m length of potentiometer Then E E2 is 1 3 5 2 2 3 3 3 2 4 5 3 RK C

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