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Dimensions of a block are 1 cm xx 1 cm x...

Dimensions of a block are `1 cm xx 1 cm xx 100 cm`. If specific resistance of its material is `3 xx 10^(-7)`ohm-m, then the resistance between the opposite rectangular faces is

A

`3xx10^(-9)` ohm

B

`3xx10^(-7)` ohm

C

`3xx10^(-5)` ohm

D

`3xx10^(-3)` ohm

Text Solution

Verified by Experts

Length l = 1cm = `10^(-2)m`

Area of cross-section A= `1 cmxx100cm`
`=100 cm^2=10^(-2)m^2`
Resistance `R=3xx10^(-7)xx(10^(-2))/(10^(-2))=3xx10^(-7) Omega`
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