Posted by **P** on Saturday, February 23, 2013 at 12:15am.

3 equal charges (all +Q) are located at A, B and C. ABC is an equilateral triangle with sides d. Point A is located at (0,0), point B at (d,0), point C at (d/2,d3√/2). Point P is inside the triangle such that AP=BP=CP. What is the electric field at P - we want the magnitude and the direction.

24Q4πϵ0d2 yˆ

0

24Q4πϵ0d2 (-yˆ)

12Q4πϵ0d2 yˆ

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