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espen180
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Homework Statement
Positive charge Q is uniformly distributed around a semicircle of radius a (See fig). Find the electric field (magnitude and direction) at the center of curvature P.
http://img132.imageshack.us/img132/8278/electricfield1.png
Homework Equations
Electric field of point charge:
The Attempt at a Solution
Since I suspect the linear charge distribution
Since each piece is a distance
By symmetry, the total electric field in the x-direction is zero, so I only have to find the field in the y-direction, which is given by
Integrating from
Since Q is positive, the field is in the negative y-direction.
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