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Gee Wiz
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Homework Statement
The charge configuration at the right consists of an insulating rod that is bent into the shape of a quarter-circle having total positive charge Q distributed uniformly over its length. Suppose that the magnitude of the total electric field at the origin due this charge configuration is E0.
In terms of E0, what would be the total electric field vector at the origin due to the semi-circle of charge shown below? The left quarter-circle has negative charge, -Q, distributed uniformly and the right quarter-circle has positive charge, Q, distributed uniformly.
Homework Equations
The Attempt at a Solution
Well for this one since the charges on the two halves of the semi circle are opposite I know that the object doesn't move in the vertical (y) direction. I also know from the charges that it moves to the left or negative x direction. But i do not know how to get the value for this problem. The answer is -√2*Eo