Electric Field due to a Charged Half-Ring

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A half-ring is centered at the origin. It has a radius R and a total charge Q. What is the electric field at the origin?
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Looks correct and fairly well explained. 5/5 would recommend. The change of integration variables wouldn't satisfy a mathematician, but I'm not one of those.

DrJeffSpirkoTAMUCC
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Great video, helped me in understanding of a problem. Are you going to do video about this tough problem but for full-ring example? I'd love that, i'm looking for an explanation of that problem for like few weeks with awful results. If yes, i'm waiting impatiently!

slythion
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hello, can i have the link to the last question u posted on the video? Thank you

covingtonkua