Question

What will be the resistance of a metal wire of length 2 m and area of crossection 1.25 x 10-6 m2, if the resistivity of the metal is 1.6 x 10-6 Ω m?

Answer 1

Answer:

Here the length of wire L=2 metres,area of cross-section A=1.55*10^-6m^2

resistivity of the metal =

p

= 2.8*10^-8Π

So,

Resistance of a metal wire is given by :R=p

L/A

=2.8*10^-8/1.55*10^-6

=.036Π

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