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Space between tow concentric spheres of ...

Space between tow concentric spheres of radii `r_(1) and r_(2)` such that `r_(1) lt r_(2)` is filled with a material of resistivity `rho`. Find the resistance between inner and outer surface of the material

A

`P/(4pi)(1/a+1/b)`

B

`P/(2pi)(1/a-1/b)`

C

`P/(4pi)(1/a-1/b)`

D

`P/(2pi)(1/a+1/b)`

Text Solution

Verified by Experts

`R= int dR=int_a ^b (pdr)/(4pir^2)=p/(4pi) [1/a-1/b]`
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