Inductors, Coils and Chokes

Inductors, coils and chokes are passive devices that are designed to resist changes in current and store energy in the form of a magnetic field. In their simplest form, inductors consist of a wire loop or coil. The inductance is directly proportional to the number of turns in the coil. Inductance also depends on the radius of the coil and on the type of material around which the coil is wound. With inductors, coils and chokes, air cores result in the least inductance for a given coil radius and number of terms.