A potentiometer wire of length 2 m has resistance of 10 ohm. It is connected in series with cell of e.m.f. 4 V and internal resistance 6 ohm. Calculate potential gradient. Find the length of potentiometer wire to balance the cell of e.m.f. 1 V. 6.Q H 1 B A 4V R=1002 L=2m
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