February 21, 2017

Homework Help: physics

Posted by jude on Saturday, February 6, 2010 at 2:20am.

Given a square of sidelength a = 5 cm. We place a charged particle at each corner, three of them carry + 2 nC of charge and one carries the same amount of negative charge.

What is the magnitude of the electric field at the center of the square?

I don't know how to start this problem and would really appreciate it if someone could tell me the method.
Thank you

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