Question

A piece of wire is redrawn by pulling it until its length is doubled. Compare the new resistance with the original resistance? Use $R=$ρ(rho)$\frac{l}{A}$

Answer 1

$\bold\red{Given:-}$

$\implies$Length of wire is doubled

$\implies$But,the volume of the wire remain in same both cases.

$\bold\red{To}$$\bold\red{Find:-}$ New and original Resistance

$\bold\red{Solution:-}$

Volume = area of cross-section × length

V= A’L’=AL

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