Thread Closed

Another charge density

 
Share Thread Thread Tools
Nov24-04, 11:29 PM   #1
 

Another charge density


At two different points of an irregularly shaped conductor, the field had the following two values
5.6*10^4 and 2.8*10^4 respectively. Find the local surface charge density at;
1- the point with the greatest radius of curvature,
2- the point with the smallest raduis of curvature.

I know that at the point with the smallest radius of curvature, charges tend to accumulate, meaning that the first field corresponds to the point of the smallest radius of curvatire and I used E = sigma/epsilon_naught to find the two local charge densities. The answers I have is the reverse of what I got, He gave he one I had for the smallest r as the one of the greatest r! Is there anything wrong here, me or him?


M B
 
PhysOrg.com
PhysOrg
science news on PhysOrg.com

>> Hong Kong launches first electric taxis
>> Morocco to harness the wind in energy hunt
>> Galaxy's Ring of Fire
Nov24-04, 11:43 PM   #2
 
Recognitions:
Homework Helper Homework Help
Science Advisor Science Advisor
Are you sure charge will accumulate where the radius of curvature is smallest? :-)
 
Nov25-04, 04:24 PM   #3
 
that is what is said on my book?

Charges tend to accumulate at the points at which radius of curvature is the smallest, that is at sharp points.

M B
 
Nov25-04, 10:51 PM   #4
 
Recognitions:
Homework Helper Homework Help
Science Advisor Science Advisor

Another charge density


If like charges repel why would they want to crowd together in tight places when they can spread out over regions of lower curvature?
 
Thread Closed
Thread Tools


Similar Threads for: Another charge density
Thread Forum Replies
Charge Density (rod) Introductory Physics Homework 1
Charge density Introductory Physics Homework 4
Charge Density Introductory Physics Homework 13
Charge Density Materials & Chemical Engineering 2
induced charge density by non-uniform dipole density in dielectric?! Classical Physics 1