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Answer on Electromagnetism Question for danish

Question #44503
The length of potentiometer wire is 600cm and it carries a current of 40mA. For a cell of e.m.f. 2V and
internal resistance 10ohm, the null point is found to be at 500cm. If a voltmeter is connected across the
cell, the balancing length is decreased by 10cm. Find (a)the resistance of whole wire. (b) reading of
voltmeter and (c) resistance of voltmeter
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