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Eight charges, each of magnitude q are p...

Eight charges, each of magnitude q are placed at the vertices of a cube placed in vacuum. Electric potential at the centre of the cube due to this system of charges is .....
`(epsi_0` 0 is permittivity of vacuum and a is length of each side of the cube)

A

Zero

B

`(sqrt(3)q)/(pi epis_0 a )`

C

`(2q)/(pi epsi_0 a)`

D

`(4 q )/( sqrt(3) pi epsi_0 a)`

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