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Four charges each of charge (+q) are pla...

Four charges each of charge (+q) are placed at the corners of square of side (0.1 meter). The net electric field intensity at the centre of the square is

A

`1/(4pivarepsilon_0) (frac(4q)(r^2))`

B

`1/(4pivarepsilon_0) (frac(q)(r^2))`

C

`(4pivarepsilon_0q)/r^2`

D

zero

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