A resistance wire connected in left gap of a metre bridge balances a 10 ohm resistance in right gap at point which divides bridge wire in ratio 3:2. if length of resistance wire is 1.5 m then length of 1 ohm of resistance wire is

Options

A. `1.0 xx 10^(-1)`m
B. `1.5xx10^(-1)`m
C. `1.5 xx 10^(-2)`m
D. `1.0xx10^(-2)m`

Answer

A

Explanation

`(R )/(10)=(l_(1))/(l_(2))=(R )/(10)=(3)/(2), R=15Omega`
length of `1Omega ` resistance wire `=(1.5)/(15)=0.1 =1xx10^(-1)m`.