Question

A steel wire of length 60 cm and area of cross section 10^6 is joined

Answer 1

it seems like your question is incomplete. A complete should be ----> Calculate the resistance of aluminium wire of length 60cm and cross-sectional area 10^-6 m² The specific
resistance of aluminium is 2.6 × 10^-8 ohm.m

solve :- length of wire, l = 60cm = 0.6m

cross sectional area of wire , A = 10^-6 m².

specific resistance or resistivity, $\rho$ = 2.6 × 10^-8 ohm. m

use formula, $R=\rho\frac{l}{A}$

R = 2.6 × 10^-8 × 0.6/10^-6

R = 1.56 × 10^-2 ohm

hence, resistance of wire is 1.52 × 10^-2 ohm