Question

theory on permanent magnet​

Answer 1

Explanation:

• The classification is based on four principles: (1) mechanical energy is converted into electrical energy (or vice versa) in the magnetic field, (2) the permanent magnet exerts a force on a ferromagnetically soft body, (3) the permanent magnet is subjected to a directional force exerted by a magnetic field, and (4) the permanent magnet exerts a force on moving charge carriers—for example, a beam of electrons in a vacuum.