An inductor is a passive electronic component. They are typically formed by insulated copper wire wound into a coil on a magnetic core, made of iron or ferrite, which allows direct current (DC) signals to pass easily.
Inductors temporarily store energy in the form of a magnetic field, measured in units of Henry (H). When current flows through an inductor, a magnetic field is generated and this energy will be stored inside the magnetic field in the coil. If the current flowing through changes, this creates a voltage.
Chokes are a type of inductor specifically used to block high-frequency alternating current (AC) signals while allowing low-frequency DC signals to pass in an electrical circuit. These inductors are referred as chokes as they restrict, or choke, these high frequencies.