## PHYS208 Fundamentals of Physics II

### Quiz 3 -- Charge Distributions

Charge + *Q* is distributed uniformly along a line segment of length *a*.

- Derive an expression for the electric field at a point
*P* a distance *r*
from the end of the segment.
- Demonstrate that for points far away from the segment, this expression for the
electric field behaves like that of a point charge.

### Take-Home Component

A similar segment of charge - *Q* is joined to the segment of + *Q* as shown below.

- Derive an expression for the electric field at a point
*P* a distance *r*
from the center of the charge distribution.
- Demonstrate that for points far away from the charge distribution, this expression for the
electric field behaves like that of a point
**dipole**.

"http://www.physics.udel.edu/~watson/phys208/quiz3.html"

Last updated March 6, 1998.

Copyright George Watson, Univ. of Delaware, 1997.