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cheungw
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Homework Statement
In what direction (using cylindrical coordinates) around a uniformly disk does the electric field NOT point?
Homework Equations
The directions could be r, θ, or z.
The Attempt at a Solution
I don't think it can point in the θ or the z direction-- either one would imply that there is a built-in preference to space for a certain direction, because symmetry arguments say that these two directions should be treated equally in all directions.
I'm not sure though-- I'm assuming they mean around the edge of the disk on the outside, is this correct?