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When an unknown resistance and a resista...

When an unknown resistance and a resistance of `4Omega` are connected in the left and right gaps of a meterbridge, the balance point is obtained at 50 cm. the shift in the balance point if a `4Omega` resistance is now connected in parallel to the resistance in the right gap is

A

66.7 cm

B

16.7 cm

C

34.6 cm

D

14. 6 cm

Text Solution

Verified by Experts

The correct Answer is:
B
`(x)/(y)=(50)/(50)` ..(1)
`(4)/(2)=(l)/((100-l))` ..(2)
`l-50=16.7`
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