Figure shows the potentiometer arrangement to compare the emf of cells E 1 and E 2 . Length of the resistance wire AB is 100 cm. If null point obtained for E 1 and E 2 are at distance 20 cm and 40 cm respectively from B then E 1 /E 2 is -
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Verified by ExpertsThe correct answer is:
D
( 
should be measured from A )
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