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A point charge is surrounded symmetrical...

A point charge is surrounded symmetrically by six identical charges at distance `r` as shown in the figure How much work is done by the froces of electrostatic repulsion when the point charge at the centre is removed to infinity ?

A

Zero

B

`6q^2//4piepsilon_0r`

C

`q^2//4piepsilon_0r`

D

`12q^2//4piepsilon_0r`

Text Solution

Verified by Experts

The correct Answer is:
B
`U_i =(6q^2)/(4piepsilon_0r)=qV_0=q(6/(4piepsilon_0r).q/r)`
`U_f=0`
`|W|=U_f-U_i|=(6q^2)/(4piepsilon_0r)`
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