# Constant potential inside spherical shell

by physicsjock
Tags: constant, inside, potential, shell, spherical
 P: 89 Hey, I just wanted to double check if what I am thinking is correct. Say you have a spherical shell of inner radius R1, and outer radius R2, which is made of a perfect conductor carrying a charge q1. E=0 inside (r
Mentor
P: 10,811
 Quote by physicsjock Hey, I just wanted to double check if what I am thinking is correct. Say you have a spherical shell of inner radius R1, and outer radius R2, which is made of a perfect conductor carrying a charge q1. E=0 inside (r
Well, there's no net electric force acting on the charge; but there's no evidence about any other forces that may or may not be acting (gravitational, inertial).
 P: 89 Yea fair enough, I didn't mention any other forces. I was just trying to understand constant potential a little better. Disregarding any other outside forces, is it correct to say since the potential is constant (no force acting), if the charge inside the spherical shell were pushed it would simply move in the direction it was pushed at a constant velocity (assuming it was only pushed a very small amount)?
Mentor
P: 10,811

## Constant potential inside spherical shell

 Quote by physicsjock Yea fair enough, I didn't mention any other forces. I was just trying to understand constant potential a little better. Disregarding any other outside forces, is it correct to say since the potential is constant (no force acting), if the charge inside the spherical shell were pushed it would simply move in the direction it was pushed at a constant velocity (assuming it was only pushed a very small amount)?
Yes, it is true for "mundane" scenarios (non relativistic velocities).

I'll just point out that a constant potential means a zero electric field, since the field is the gradient of the potential. No field means no force.

 Related Discussions Introductory Physics Homework 1 Introductory Physics Homework 1 Advanced Physics Homework 2 Introductory Physics Homework 2 Advanced Physics Homework 5