## PHYS208 Fundamentals of Physics II

### Hint for Ch. 23, special problem

Consider charge elements that are conjugate about the perpendicular bisector of P.
The contribution to E from the negative and positive infinitesimal elements will
combine to point down, horizontal components cancelling. The result for the point
dipole (Ch. 23: 25P) can be used for the conjugate pair and the linear charge
density integrated from 0 to a.

"http://www.physics.udel.edu/~watson/phys208/exercises/hints/23-spec.html"

Last updated Sept. 20, 1997.

Copyright George Watson, Univ. of Delaware, 1997.