Questions
In a potentiometer experiment, the balance with a cell is at length 240 cm. On shunting the cell with a resistance of 2, the balancing length becomes 120 cm. The internal resistance of the cell is.
detailed solution
Correct option is C
The internal resistance r is given byr=Rl−l′l′=2240−120120=2×120120=2ΩTalk to our academic expert!
Similar Questions
In the network shown, when switch S is open balancing length AN1 = 60 cm and when the switch S is closed, balancing length AN2 = 50 cm. then the value of r is
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