Problem 9P

Two concentric spherical shells carry uniformly distributed charges +Q (at radius a) and −Q (at radius b > a). They are immersed in a uniform magnetic field

(a) Find the angular momentum of the fields (with respect to the center).

(b) Now the magnetic field is gradually turned off. Find the torque on each sphere, and the resulting angular momentum of the system.

Solution 9P

Step 1 of 7:

In this question, we need to find angular momentum of the fields

In part b, we need to find the torque on each sphere and the resulting angular momentum of the system when the magnetic field is gradually turned off