Created by StemPy LabTwo cells balance on a potentiometer wire at and . What is the ratio of their emfs, first to second?
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← A student finds the resistance of a coil with a meter bridge. The coil is in the left gap and an 18 Ω box is in the right gap. The galvanometer reads zero when the jockey touches the wire at the 45 cm mark. What is the resistance of the coil?A potentiometer measures the emf of a cell more accurately than a voltmeter does, because at balance the potentiometer →
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