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The work done required to put the four c...

The work done required to put the four charges together at the comers of a square of side a, as shown in the figure is

A

`1/(4piepsilon_0)q^2/a`

B

`-2.6/(4piepsilon_0)q^2/a`

C

`+2.6/(4piepsilon_0)q^2/a`

D

None of these

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