91Ó°ÊÓ

The three basic interactions between electricity and magnetism are: 1. Electric currents produce magnetic fields: When an electric current flows through a conductor, it creates a magnetic field around the conductor in the form of concentric circles, with the strength depending on the current intensity. 2. Moving electric charges experience a force in a magnetic field: When an electric charge moves through a magnetic field, it experiences the Lorentz force, which is perpendicular to both the velocity of the charge and the magnetic field direction. The force's magnitude is given by the equation F = q(v × B). 3. Changing magnetic fields induce electric currents: When a magnetic field changes within a closed loop of wire, an EMF is induced in the loop, driving an electric current that generates its magnetic field, opposing the change in the magnetic field that induced it. This is described by Faraday's law, with the equation EMF = -dΦB/dt.