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Three equal charges, each +q are placed...

Three equal charges, each `+q ` are placed on the corners of an equilateral triangle . The electric field intensity at the centroid of the triangle is

A

`(3Q)/(r^(2))`

B

`(3Q)/(r )`

C

`(1)/(v^(2)) (Q)/(r^(2))`

D

zero

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The correct Answer is:
D
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