Question

A wire of length 100cm and cross-sectional area 2.0*10-3cm2 has a resistance of 0.1 ohms.
calculate it's electrical conductivity? 
Given:
L = 100 cm = 1.0 m.
A = 2.0*10^-3 cm^2 = 2.0*10^-7 m^2.

R = P*L/A.
0.1 = P*1.0/2*!0*-7,
P = 2*10^-8 Ohm-meters.

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