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ABC is an equilateral triangle. Charges ...

`ABC` is an equilateral triangle. Charges `+q` are placed at each corner. The electric intensity at `O` will be

A

`(1)/(4piin_(0))(q)/(r)`

B

`(1)/(4piin_(0))(q)/r^(2)`

C

`(1)/(4piin_(0))(3q)/r^(1)`

D

zero

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