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A nichorme wire 50cm long 1mm^2 cross- s...

A nichorme wire 50cm long 1mm^2 cross- section carries a current of 4 A. When connected to 2V battery The resistivity of nichrome wire in `Omega-m` is

A

`1xx10^-6`

B

`4xx10^-7`

C

`3xx10^-2`

D

`2xx10^7`

Text Solution

Verified by Experts

The correct Answer is:
C
Shunt resistance , `S=(I_gG)/(I-I_g)`
= `(100xx10^(-6)xx100)/(1xx10^(-3)-(100xx10^(-6))`
= `(100)/(9)Omega`
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