Unformatted text preview: • Outside the solid part of the sphere, you can find the net electric field by adding, as vectors, the electric field from the point charge alone and from the sphere alone We know that the electric field from the point charge is given by kq / r 2 . Because the charge is positive, the field points away from the charge. If we took the point charge out of the sphere, the field from the negative charge on the sphere would be zero inside the sphere, and given by kQ / r 2 outside the sphere. The net electric field with the point charge and the charged sphere, then, is the sum of the fields from the point charge alone and from the sphere alone (except inside the solid part of the sphere, where the field must be zero). This is shown in the picture:...
View
Full Document
 Fall '10
 DavidJudd
 Physics, Charge, Electric Fields, Gauss' Law, Power, Electric charge

Click to edit the document details