Inductor - Coil

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 An electric wire wound in loops is called a coil. If current flows in a coil, a magnetic field is generated that goes through the inside of the coil. If an iron core is inserted in the coil, the magnetic field is concentrated in the iron, and it becomes a strong electromagnet. The strength of an electromagnet is proportional to the product of the current and the number of loops in the coil, if the direction of the current is reversed, the polarity of the electromagnet is also reversed. If the current is stopped, the magnetic force of the electromagnet disappears, on the schematic diagram and on the motherboard an inductor is represented by letter (L).

  

Below are a few examples of inductors:

 

        Inductors Types


              The symbol of Coil on schematic diagram

 

  


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