• Support PF! Buy your school textbooks, materials and every day products Here!

Charge distribution over two thin concentric spherical shells

  • #1

Homework Statement


"A thin conducting spherical shell of radius a carries a charge q. Concentric with this is another spherical shell of radius b>a carrying a net charge Q. Describe how the charge is distributed between the inner and outer surfaces of the shells. What is te capacitance of the two shells?"


Homework Equations





The Attempt at a Solution


Is it correct to say that there would be a charge +q on the outer surface of the inner shell. Due to induced charge there would then be a charge -q on the inner surface of the outer shell. Therefore there would be a charge +Q-q on the outer surface of the outer shell.

For the capacitance does it want the capacitance of the overall system. C=Q/V ???????
 

Answers and Replies

  • #2
1,444
0
Q is the net charge, when i did this question i took it to mean that Q=-q as it is induced by the +q on the inner sphere. note: to be a capacitor the two plates have to carry equal and opposite charges.

use gauss' law to get the field and then go from there in order to get the capacitance.
 
  • #3
2,257
7
+Q-q ???
 

Related Threads for: Charge distribution over two thin concentric spherical shells

Replies
11
Views
6K
Replies
2
Views
1K
Replies
3
Views
2K
Replies
1
Views
2K
Replies
1
Views
4K
Replies
1
Views
4K
Top