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In the figure shown eight resistors each...

In the figure shown eight resistors eachof resistance 'R' are connected to form two squares ABCH and DEFG. Four resistors each of resistors '2R' are connected in the vertical lines AF, BG, CD and EH. 'A' and 'C' are connected to a battery of interal resistance 'R' and emf V. Find out the current in 'AB' and 'ED'.

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