Question

A copper wire of length 2 and area cross section 1.7 into 10 to the power minus 6 metre square has resistance of 2 into 10 to the power minus 2 ohms calculate its resistivity

Answer 1

i hope this helps dude.....

Answer 2

Resistivity is an intrinsic property of the material of a conductor. It varies from material to material.

It is given by

ρ=AR/l

Where

1. ρ= resistivity
2. A=Area of cross-section
3. l=length of conductor
4. R= resistance

In this case

ρ= 1.7 x 10⁻⁶ m² x 2 x 10⁻² Ω/ 2 m

 = 1.7 x 10⁻⁸ Ωm