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From a sphere of electrical conductivity...

From a sphere of electrical conductivity K two planes cut a piece such that first plane passes through the centre of sphere and second parallel to first one at distance `R//2` from centre then resistance between A and B

A

`(1)/(piKR)`

B

`(sqrt3)/(piKR)`

C

`(ln3)/(2piKR)`

D

None

Text Solution

Verified by Experts

The correct Answer is:
C
`int(1)/(K).(dx)/(pi(R^(2)-x^(2)))`
`R_(T) = (1)/(k pi) int (dx)/((R^(2) - x^(2))) = (1)/(2K piR)` In (3)
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