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In a metre bridge , the gaps are enclose...

In a metre bridge , the gaps are enclosed by resistances of `2omega` and `3Omega` . The value of shunt to be added to `3Omega` resister to shift the balancing point by 22.5cm is

A

`1Omega`

B

`2Omega`

C

`2.5Omega`

D

`5Omega`

Text Solution

Verified by Experts

The correct Answer is:
B
Potential difference , `V_dalpha (1)/(l)`
`Rightarrow V_(d_1)=V_(d_2)= (l_2)/(l_1) = (4l)/(l) =4`
`therefore Vd_1= 4Vd_2`
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