Q. An electric dipole p makes the angle of 30° with a uniform electric field of magnitude 300 N/C. If the torque on the dipole is 3 × 10-12 N • m after that calculate the magnitude of the dipole moment p.
Q. A small conducting spherical shell with inner radius a and outer radius b is concentric with a larger conducting spherical shell with inner radius c and outer radius d. The inner shell has the total charge of -1q and outer shell has a total charge of +3q.