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mjolnir80
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Homework Statement
the wire in the image below has a linear charge density [tex]\lambda[/tex] . what is the electric potential at the center of the semicircle?
http://img18.imageshack.us/img18/5139/physicsproblem.jpg
Homework Equations
The Attempt at a Solution
i know that the potential from the semi circle is V=KQ/R
but I am having a little trouble figuring out how to calculate the potential from the other 2R pieces of wire.
can someone help me out here :)
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