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AB is a wire of uniform resistance. The ...

`AB` is a wire of uniform resistance. The galvanometer `G` shows no deflection when the length `AC = 20 cm` and `CB = 80 cm`. The resistance `R` is equal to.
.

A

`2 Omega`

B

`8 Omega`

C

`20 Omega`

D

`40 Omega`

Text Solution

Verified by Experts

The correct Answer is:
C
(c ) By Wheatstone bridge, `(R )/(80) = (AC)/(BC) = (20)/(80) implies R = 20 Omega`
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