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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A 5 m potentiometer wire having 3Ω resistance per meter is connected to a storage cell of steady emf 2V and internal resistance 1Ω. A primary cell is balanced against 3.5m of it. When a resistance of 32/nΩ is put in series with the storage cell, the null point shifts to the centre of the last wire, i.e., 4.5 m. What is ‘n’?

A 5 m potentiometer wire having 3Ω resistance per meter is connected to a storage cell of steady emf 2V and internal resistance 1Ω. A primary cell is balanced against 3.5m of it. When a resistance of 32/nΩ is put in series with the storage cell, the null point shifts to the centre of the last wire, i.e., 4.5 m. What is ‘n’?

A battery of emf ε0 = 5 V and internal resistance 5Ω is connected across a long uniform wire AB of length 1m and resistance per unit length 5Ω/m. Two cells of ε1 = 1 V and ε2 = 2 V are connected a