Question

three point charges of equilateral triangle q at a vertices find electric field intensity at centre point O

Answer 1

Answer:

Your answer is in the above attachment

Here at the centre of the triangle -Q charge is taken to balance the other charges q

Answer 2

Answer:

REFER THE ATTACHMENT.......

as the charges are equal and the produce electric field symmetrically at the centre they will cancel each other........

So net electric field intensity will be zero

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