Question:
A potentiometer circuit has been set up for finding the internal resistance of a given cell. The main battery, used across the potentiometer wire, has an emf of 2.0 V and a negligible internal resistance. The potentiometer wire itself is 4 m long. When the resistance, R, connected across the given cell, has values of.
(i) infinity
(ii) 9.5 Ω,
the 'balancing lengths', on the potentiometer wire are found to be 3 m and 2.85 m, respectively. The value of internal resistance of the cell is:
A potentiometer circuit has been set up for finding the internal resistance of a given cell. The main battery, used across the potentiometer wire, has an emf of 2.0 V and a negligible internal resistance. The potentiometer wire itself is 4 m long. When the resistance, R, connected across the given cell, has values of.
(i) infinity
(ii) 9.5 Ω,
the 'balancing lengths', on the potentiometer wire are found to be 3 m and 2.85 m, respectively. The value of internal resistance of the cell is:
(i) infinity
(ii) 9.5 Ω,
the 'balancing lengths', on the potentiometer wire are found to be 3 m and 2.85 m, respectively. The value of internal resistance of the cell is:
Updated On: Dec 20, 2025
- 0.95 Ω
- 0.5 Ω
- 0.75 Ω
- 0.25 Ω
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The Correct Option is B
Solution and Explanation
The correct option (B): 0.5 Ω
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