Sunday, 3 February 2013

Find value of Resistance - IIT JEE 2005


Problem:
In the figure both cells A and B are of equal emf. Find R for which potential difference across battery A will be zero, long time after the switch is closed. Internal resistance of batteries A and B are $r_{1}$ and $r_{2 }$respectively ($r_{1}>r_{2 }$).


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