Electric field due to semi-circular ring of charges - the maths!

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hsmith9669
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Dear TSR,

I am having deep trouble on this question, in particular with the mathematics.

I would like to find the electric field due to a semi-circular ring of charges, uniformly distributed, centred at the origin of the x,y plane. Yes, this is a physics quesiton, but I am looking for guidance on the maths involved. Also why can I not use Gauss' Law?

I would just the solution with the mathematics explained. I am not little that I need guiding through it, I'd just like a full solution with some explanation so I can follow through, as I do with most of my work.

Thank you kind souls.
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username2769500
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 BqV = Something here = \frac{mv^2}{r} where m is the mass of an electron 9.11... because I have no idea but that's what I would use.
You need to find the something here but I left BqV in so you know why even though that is magnetic fields.
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