A potentiometer wire A B having length L and resistance 12 r is joined to a cell D of emf \epsilon and internal resistance r. A cell C having emf \frac{\epsilon}{2} and internal resistance 3 r is connected. The length AJ at which galvanometer as shown in figure shows no deflection is

MHT CET 2021 Physics Solved Paper

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A potentiometer wire AB having length L and resistance 12r is joined to a cell D of emf ε and internal resistance r. A cell C having emf ‌

and internal resistance 3r is connected. The length AJ at which galvanometer as shown in figure shows no deflection is

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