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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

A. `(Q)/(4piepsilon_(0)r^(2))`

B

B. `(Q)/(4piepsilon_(0)r)`

C

C. Zero

D

D. `(Q^(2))/(4piepsilon_(0)r^(2))`

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