Physics-
General
Easy
Question
There is no current in a 2 
resistance, then the equivalent resistance of the given circuit is :
- 10
- 20
- (13/7)
- 5
The correct answer is: 10
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A cell when balanced with potentiometer gave a balance length of 50 cm. Then a 4.5 external resistance is introduced in the circuit. Now it is balanced on 45 cm. The internal resistance of the cell is :
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