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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > Potentiometer wire PQ of 1 m length is connected to a standard cell E1. Another cell, E2 of emf 1.02 V is connected with a resistance r and a switch S open, null position is obtained at a distance of 51 cm from P Calculate (i) potential gradient of the potentiometer wire and (ii) emf of the cell E1 (iii) when switch S closed will mull point move toward P or toward Q ? Given reason for your answer ?

Potentiometer wire PQ of 1 m length is connected to a standard cell E1. Another cell, E2 of emf 1.02 V is connected with a resistance r and a switch S open, null position is obtained at a distance of 51 cm from P Calculate (i) potential gradient of the potentiometer wire and (ii) emf of the cell E1 (iii) when switch S closed will mull point move toward P or toward Q ? Given reason for your answer ?

E2 of emf 1.02 V is connected with a resistance r and a switch S open Figure shows a potentiometer circuit for comparison of two resistances. The balance point with a standard resistor R=10.0Ω is found to be 58.3 cm Potentiometer wire PQ of 1 m length is connected to a standard cell E1. Another cell while that with the unknown resistance X is 68.5 cm. Determine the value of X. What might you do if you failed to find a balance point with the given cell of emf ϵ?