There are many kinds of components that posses self-inductance. Such as, Solenoid coils, the loudspeakers and other few other devices that include a coil. Even the leads of a capacitor, resistor or transistor, though they do not have coil, possess few self-inductance at radio frequencies. In these cases the Inductance is very low and is thus ignorable, or may cause problems.
Inductance is a useful attribute of certain other type of components. These include the following:
Chokes:
The chokes are effectively applied for blocking high-frequency signals so that they cannot pass through from one part of a circuit to another. Low-frequency signals or DC voltage levels has the ability to pass through. Large chokes look like transformers, but contain only one coil. Small chokes has beads or collars that are composed of ferrite, and are threaded on to the wire that is carrying the high frequency signals.
