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The figure shows a meter bridge circuit ...

The figure shows a meter bridge circuit with AB=100 cm, X=`12 Omega andR=18 Omega` and the jockey J in the position of balance. If R is now made `8Omega` through what distance will J have to be moved to obtain balance?

A

`10 cm`

B

`20 cm`

C

`30 cm`

D

`40 cm`

Text Solution

Verified by Experts

The correct Answer is:
B
`12/18=l/(100-l)implies l=40cm`
Now `12/8=(l')/(100-l')implies l'=60 cm`
Shifting ballancing position `=l'-l=20 cm`
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