A uniform metallic wire is stretched so that its length becomes times its original…

PHYSICS · Single correct · CBSE · Physics · Current Electricity · Current Electricity

Problem

A uniform metallic wire is stretched so that its length becomes

n

times its original length while its volume remains constant. If its initial resistance is

R_0

, what is its resistance after stretching? (a)

n^{2}\,R_{0}

(b)

\dfrac{R_{0}}{n^{2}}

(c)

n\,R_{0}

(d)

R_{0}