Questions
A Daniel cell is balanced on 125 cm length of a potentiometer wire. Now the cell is short-circuited by a resistance 2 ohm and the balance is obtained at 100 cm. The internal resistance of the Daniel cell is
detailed solution
Correct option is A
r=l1−l2l2 R= 251002 = 0.5 ΩTalk to our academic expert!
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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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