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In the shown figure, bridge is balanced,...

In the shown figure, bridge is balanced, the current flowing through `2Omega` resistance is

A

`(10)/(8)A`

B

`(11)/(7)A`

C

`(13)/(7)A`

D

`(8)/(7)A`

Text Solution

Verified by Experts

The correct Answer is:
A
Let I be the current flowing through PQR then the current flowing through PSR is (2-I) A. Now since galvanometer no deflection then the volatage through arm PQR is sam as the voltage through arm PSR.
`I(4+2)=(2-I)(10+5),6I=30-15I`
`21I=30 Rightarrow I=(30)/(21)=(10)/(7)A`
Hence, the current through `2 Omega` resistor is `(10)/(7)A`
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