Question

A wire connected in the left gap of a meter bridge balance is $10\Omega$ resistance in the right gap to a point, which divides the bridge wire in the ratio $3:2$. If the length of the wire is $1$. The length of one ohm wire is?

• A. $0.057$m
• B. $0.067$m
• C. $0.37$m
• D. $0.134$m

Answer 1

The correct option is B $0.067$m

Given,

$R:S=3:2$

$S=10\Omega$

Ratio, $\frac{R}{S}=\frac{3}{2}$

$R=\frac{3}{2}\times 10=15\Omega$

The length of $1\Omega$ wire is given by

$l=\frac{1}{15}$

$l=0.067m$

The correct option is B.