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There are two uncharged identicasl metal...

There are two uncharged identicasl metallic spheres 1 and 2 of radius r separated by a distance `d(dgtgtr)`. A charged metalllic sphere of same radius having charge q is touched with one of the sphere. After some time it is moved away fom the system. Now, the uncharged sphere is earthed. Charge on earthed sphere is

A

`+q/2`

B

`-q/2`

C

`-(qr)/(2d)`

D

`-(qd)/(2r)`

Text Solution

Verified by Experts

The correct Answer is:
C

Let charge on B is q'
`V_B=0`
`:. ((k(q/2)))/d+(kd')/r=0`
`:. q'=-(qr)/(2d)`
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