Question

a wire is 1m long,0.2mm in diameter and has a resistance of 10omh . calculate the resistance of its material

Answer 1

don't u mean the resistivity of the material?

Answer 2

assuming it to be resistivity, use the following eq to get the final answer.
\[R = \rho L/A\]
where, R = resistance = 10 ohms
L = length of the wire = 1m
A = area of cross-section = pi*r^2 = 3.14*0.2*0.2*10^(-6)
and \[\rho = \] resistivity = which is the unknown.

Answer 3

Area of cross-section
\[A=\pi \times .1\times .1\times 10^{-6}m ^{2}\]

Answer 4

ah! yes....my bad! the radius will be 0.1mm...so A will be as @kropot72 says.