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Manipal Entrance Test 2016 Physics Paper

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Question : 19

Total: 50

In a potentiometer experiment for measuring the emf of a cell, the null point is at 240‌cm when we have a 500Ω resistor in series with the cell and galvanometer. If the series resistance reduced to half, then the null point will be at

480‌cm
240‌cm
120‌cm
60‌cm

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