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Three eqal charges +Q each are at the co...

Three eqal charges `+Q` each are at the corners of an equilibrium triangle as shown. The intensity of electric field at O will be

A

`(Q)/(4pi epsilon_(0)r^(2))`

B

`(Q)/(4pi epsilon_(0)r)`

C

Zero

D

`(Q^(2))/(4pi epsilon_(0)r^(2))`

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