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Hi everyone :-) This is my first post here!

I have a question regarding electrostatics, in the picture above. I am not looking for the solution at all as this work will be assesed, Im just hoping that someone can verify/ poke me in the right direction.

First of all potential is q/(k*x) in x-hat direction?

Integrate that over 2*Pi*a to get potential of a hoop.

Using cosine rule to express x in terms of theta, then integrate over whole hoop from 0 to Pi..

Thats what I have been trying, and Im not having any joy. Any small pointers would be most appreciated!

I hope that was okay for a first post!

~Gaz

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# Homework Help: Electromagnetism, potential

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