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MHT CET Physics question

PhysicsCurrent ElectricityMHT CET

The potentiometer wire of resistance R is connected in series with a cell of e. m. f. E and of internal resistance r along with external resistance . The current flowing through the potentiometer wire is

Answer: (A)

Solution

The wire, the cell's internal resistance and the external resistance are in series, so ;

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Question ID VK-045019