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N 9 The length of a potentiometer wire is 1200 cm and it carries a...

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N 9 The length of a potentiometer wire is 1200 cm and it carries a current of 60 mA For a cell of emf 5 V and internal resistance of 20 the null point on it is found to be at 1000 cm The resistance of whole wire is a 800 b 1200 c 60 d 100 ller of radius R and

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