Register to reply

Electric Field Question

by BlueCardBird
Tags: electric field, electric field lines
Share this thread:
BlueCardBird
#1
Dec17-12, 08:25 PM
P: 25
For the equation ε=ΔV/r, does this work only between 2 parallel plates or would it work for point charges as well?
Phys.Org News Partner Physics news on Phys.org
An interesting glimpse into how future state-of-the-art electronics might work
What is Nothing?
How computing is transforming materials science research
CWatters
#2
Dec18-12, 05:38 AM
P: 3,135
http://en.wikipedia.org/wiki/Electri...a_point_charge
Xidike
#3
Dec18-12, 07:25 AM
P: 72
I love Electrostatics <3

Khashishi
#4
Dec18-12, 10:26 AM
P: 887
Electric Field Question

Do you know calculus? Your equation seems to be another way of writing [itex]|E| = \Delta V/\Delta r[/itex], which is only an approximation. The correct value is gotten by taking the limit as Delta goes to 0. Then you get:
[itex]E=-\nabla V[/itex]
In the special case of infinite parallel plate, they give the same answer, but for a curved E field you get a more accurate answer for smaller step size.


Register to reply

Related Discussions
Electric Potential / Electric Field Question Introductory Physics Homework 1
Question about Electric Field Strength and Electric Potential Introductory Physics Homework 1
HELP A question on electricity (electric field and electric potential) Introductory Physics Homework 11
Electromagnetic Waves Question, regarding Magnetic Field and Electric Field Introductory Physics Homework 25
Question about ELectric field and electric potential Introductory Physics Homework 3