Questions
The length of potentiometer wire is 1200cm and it carries a current 30 mA. For a cell of emf 5V and internal resistance of . The null point on it is found to be at 1000 cm. The resistance of whole wire is
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Correct option is A
Potential gradient =51000=Vp1200Vp = 6VRp =VpI=630×10−3=200 ΩSimilar Questions
In an experiment with potentiometer to measure the internal resistance of a cell, when the cell is shunted by
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