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A wire of 50 cm long, 1mm^(2) in cross-s...

A wire of 50 cm long, `1mm^(2)` in cross-section carries a current of 4 A, when connected to a 2 V battery, the resistivity of wire is

A

`2 xx 10^(-7) Omega m`

B

`5 xx 10^(-7) Omega m`

C

`4 xx 10^(-6) Omega` m

D

`1 xx 10^(-6) Omega m`

Text Solution

Verified by Experts

The correct Answer is:
D
`R = (V)/(I) = (rho L)/(A) therefore rho = (VA)/(IL)`
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