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August 22, 2014

Homework Help: Physics

Posted by Julia on Thursday, February 11, 2010 at 8:29pm.

Recall that for a finite rod of length L and total charge Q, the electric field for a point located a perpendicular distance r from the middle of the rod has a magnitude given by:


Consider the limit of large distances, where a finite charged rod is observed at a distance that is very large when compared to the length of the rod.

In this situation, the electric field best resembled that of a ...


a)point charge ... it goes like r-2

b) infinite line ... it goes like r-1

c) electric dipole ... it goes like r-3

d) infinite plane ... it is constant

none of the above ... it is zero

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