An inductor is a passive two-terminal electrical component that stores energy in a magnetic field when electric current flow through it. An inductor is also called as a coil choke or reactor, it consists of an insulated wire wound into a coil around a core it stores electrical energy in the form of magnetic energy. Basically, it uses a conductor that is wound into a coil and when electricity flows into the coil from left to right this will generate a magnetic field in a clockwise direction. When the current flowing through an inductor changes the magnetic field induces an elctromotive force in the conductor the induced voltage has a polarity which opposes the change in current that created it. As a result, inductor opposes any change in current through them inductors have a value that typically ranges from 1 megahertz to 20 h. Many inductors have a magnetic core made of iron or ferrite inside the coil which increases the magnetic field and thus the inductance



In air core inductors ceramic is the most common material used for inductor cores ceramic has a very low thermal coefficient of expansion so the stability of the inductor will be high for high temperatures. Ceramic has no magnetic property so there won’t be any increase in permeability value due to the core material. The main advantages of these inductors are very less core loss high-quality factor these are mainly used in high-frequency applications where low inductance values are needed


These inductors are used in places were low space inductors are needed these inductors has high power and high inductance value but limited in high-frequency capacity these are used in audio equipment. These inductors have very limited applications


This type of inductors is referred to a ferromagnetic material. They exhibit magnetic property they consist of mixed metal elements of iron and other elements of crystalline structures. XFe2O4 Is the general composition of ferrites

Where X represents transition materials ferrites are mainly two types of soft and hard ferrite these are classified according to its magnetic coercivity


As the name indicates this inductor consists of many layers by adding an additional layer of coiled wire that is wound around a center core of inductor gives multi-layer inductor generally for more number of turns more inductance will be there. In these not only the inductance increase but also the capacitance betwwen the wire increases the main advantage of this inductor is by giving lower operating frequency we will get higher inductance result


  • Inductors are widely used in analog circuits and signal processing
  • Switching frequency for switched mode power supplies
  • Prevents radio frequency interference
  • It is used as an energy storage device in many switched mode power supplies to produce DC current
  • Inductors are used in electrical transmission systems were they are used to limit switching currents and fault currents
  • An inductor functions as a low pass filter
  • Inductors can be used as sensors to sense a magnetic field
  • Combining inductors that having shared magnetic path will form a transformer
  • Energy storage