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

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

A

`0.2A`

B

`0.1 A`

C

`2.0 A`

D

`1.0 A`

Text Solution

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The correct Answer is:
A
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