Statement of a problem № 42228


A solid conducting sphere of radius R carries a charge Q. Calculate the electric-field energy density at a point a distance r from the center of the sphere for (a) r < R and (b) r > R. (c) Calculate the total electric-field energy associated with the charged sphere. (d) Explain why the result of part (c) can be interpreted as the amount of work required to assemble the charge Q on the sphere. (e) By using Eq. (24.9) and the result of part (c), show that the capacitance of the sphere is as given in Problem 24.67.

New search. (Also 5349 free access solutions)