Inductor is passive electronic component. Inductors are classified according to the types of core used. These are:

a) Air core Inductor

b) Iron core Inductor

c) Ferrite core Inductor

A)Air core Inductor

It consisit of number of turns of wire wound on hollow tube. In this, air acts as core, hence the name is Air core inductor. In air core inductror, magnetic flux loss are present but no core losses even at high frequency. So, air core inductor can be used a for RF application, known as Chokes Symbol used for air core inductor is