Register to reply

Metal sphere and charges:

by Deoxygenation
Tags: charges, metal, sphere
Share this thread:
Deoxygenation
#1
May8-08, 11:12 PM
P: 11
I'm trying to get a better understanding of this sort of thing. Here is what I know...

A postive point charge "q" is placed at the center of an uncharged metal sphere insulated from the ground. The outside of the sphere is then grounded from the outside. Then the ground wire is removed. A is the inner surface and B is the outer surface of a metal sphere.

Thus, the charge on A is -q and there is no charge on B.


Now my question is that, what does the grounding wire have anything to do with this? Is it the thing that allows charges to escape into the ground making it less charged?

Also, instead of a postive point charge at the center, what if it was negative point charge at the center?, would the charge on B (Outer surface) be, -q then A (inner surface) is +q ?

I'm just trying to think how to properly think about this sort of arrangement as a whole. Thanks for any help :+)
Phys.Org News Partner Physics news on Phys.org
Physicists discuss quantum pigeonhole principle
First in-situ images of void collapse in explosives
The first supercomputer simulations of 'spin?orbit' forces between neutrons and protons in an atomic nucleus
DaleSpam
#2
May9-08, 06:43 AM
Mentor
P: 16,961
After grounding there is no charge on the sphere


Register to reply

Related Discussions
Potential of a metal sphere with changing radius Introductory Physics Homework 6
The capacitance of the two metal sphere system Advanced Physics Homework 7
Electric Fields on a Hollowed Metal Sphere Introductory Physics Homework 7
Metal sphere and electric field Introductory Physics Homework 5
Modification to metal sphere problem Introductory Physics Homework 1