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When an unknown resistance and a resista...

When an unknown resistance and a resistance `6Omega` are connected in the left and right gaps of a meter bridge the balance point is obtained at 50 cm. if `3Omega` resistance is connected in parallel to resistance in right gap, the balance point is

A

decreases by 25 cm

B

increases by 25 cm

C

decreases by 16.7 cm

D

increase by 16.7 cm

Text Solution

Verified by Experts

The correct Answer is:
B
`X/R =l/(100-l)`
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