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September 22, 2014

Homework Help: physics-E&M

Posted by aaron b. on Friday, January 27, 2012 at 5:29pm.

An infinite line charge of uniform linear charge density lambda = -2.5 micro Coulombs lies parallel to the y axis at x = 0 m. A point charge of 3.5 micro Coulombs is located at x = 2.5 m, y = 3.5 m. Find the x- and y-components of the electric field at x = 3.5 m, y = 3.0 m.

So I get what this is asking; you have to point charges with locations given; what is the charge of the third at another given location. What I'm *not* sure of is what equations/approach to use.

I don't want to throw anyone under the bus (knowledge of the material is my responsibility) but my prof. just kinda mumbles and points at PowerPoint slides with a laser pointer so I don't have anything from my lecture to help with this. Any assistance would be much obliged; thank you in advance.

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