20.3 Electromagnetic Induction

• The basic process of generating currents with magnetic fields is called induction; this process is also called magnetic induction to distinguish it from charging by induction, which uses the electrostatic Coulomb force.
• The emf may be defined as the rate at which energy is drawn from a source per unit current flowing through a circuit.
• Going back to our sail analogy, it would be proportional to the force of the wind on the sail. It is called the magnetic flux