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A copper wire of length 2 m and area of ...

A copper wire of length 2 m and area of cross-section `1.7xx10^(-6)m^(2)` has a resistance of `2xx10^(-2)Omega.` The resistivity of copper is

A

`1.7xx10^(-8)Omegam`

B

`1.9xx10^(-8)Omegam`

C

`2.1xx10^(-7)Omega m`

D

`2.3xx10^(-7)Omega m`

Text Solution

Verified by Experts

The correct Answer is:
A
Resistivity, `rho=(RA)/(l)=(2xx10^(-2)xx1.7xx10^(-6))/(2)=1.7xx10^(-8)Omega m`
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