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A cylindrical metal wire of length l an...

A cylindrical metal wire of length l and cross sections area S , has resistance R , conductance G , conductivity `sigma` and resistivity `rho` . Which one of the following expressions for `sigma` is valid

A

`(GR)/(rho)`

B

`(rhoR)/(G)`

C

`(GS)/(l)`

D

`(Rl)/(S)`

Text Solution

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The correct Answer is:
A
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