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The resistances of the four arms P, Q, R...

The resistances of the four arms P, Q, R and S in a Wheatstone’s bridge are 10 ohm, 30 ohm, 30 ohm and 90 ohm, resispectively. 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

2.0 A

B

1.0 A

C

0.2 A

D

0.1 A

Text Solution

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The correct Answer is:
C
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