Register to reply

Electric Field of an n sided polygon

by lao
Tags: electric, field, polygon, sided
Share this thread:
Oct13-05, 08:53 PM
P: 1
We have an n sided polygon, each side is length 2L and R is the distance from the center of the polygon to the mid-point of any side. We know, L=Rtan(pi/n).

I need: "the E-field on the axis of the polygon at a point distance h above it"

When n goes to infinity, we should get the same E-field as a uniform ring charge:
E= kQh/(h^2+R^2)^1.5

any help would be awesome, thx :)
Phys.Org News Partner Science news on
Final pieces to the circadian clock puzzle found
A spray-on light show on four wheels: Darkside Scientific
How an ancient vertebrate uses familiar tools to build a strange-looking head
Oct14-05, 01:02 AM
Sci Advisor
HW Helper
P: 3,144
And, what have you done so far to solve the problem?
Oct14-05, 04:07 AM
P: n/a
Simple: do we have any symmetry here? Find the field to a single side (a finite line segment).

Hope this helps.

Register to reply

Related Discussions
1.) Net electric field and 2.) Maximum electric field from centre of a ring Introductory Physics Homework 7
Period of an electric dipole rotating in an external electric field Introductory Physics Homework 2
Electric field in a dielectric in terms of the electric field in the vacuum Introductory Physics Homework 0
Electric Field/Electric Potential (Gradient Notation) Introductory Physics Homework 4
Calculating Electric Potential in A Uniform Electric Field Introductory Physics Homework 4