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The resistance of the four arms P,Q,R an...

The resistance of the four arms P,Q,R and S in a Wheatstone's bridge are 10 ohm, 30 ohm, 30 ohm and 90 ohm, respectively.The e.m.f. and internal resistance of the cell are 7 volt and 5 ohm respectively.If the galvanometer resistance is 50 ohm, the current drawn from the cell will be

A

1.0 A

B

0.2 A

C

0.1 A

D

2.0 A

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