Questions
Internal resistance of a given cell is to be found by a potentiometer and the circuit is as shown in the figure. When switch S is open balance length is found to be 250 cm and when S is closed, balance length is found to be 210 cm. The internal resistance r is
detailed solution
Correct option is C
(3)r=Rl1l2−1=10250210−1Ω=1.9ΩTalk 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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