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Saturday, 1 July 2017

Types of Coil or Inductor

Types of Coil or Inductor




What is  Coil ( Inductor ) and How is it Made?

How to Check Coil by digital multimeter 

 These are tiny chip inductors directly soldered on the PCB track on the mobile cell phone. This type of inductor is called general purpose inductor. This is used for sharp frequency response for high quality factor. 

These inductors are made by spiraling wire on ferrite core with magnetic shield and surface mounting terminals are created on both ends after mounting it in a small hard package. These terminals are nickel coated for easy and better soldering on PCB Track. Nickel coating ensures reliable soldering.




What is the Graphical Symbol of Coil?

The Graphical Symbol of Coil is
Coil Symbol

Which character or alphabet indicates a Coil?

Coil is indicated by the alphabet L

What is the Work of a Coil?

The main function of a Coil is to STOP AC and PASS DC.

What is the Unit of Coil?

The Unit of Coil is Henry.




Effect of DC on Coil

A Coil passes DC Current like an ordinary wire. Magnetic properties are generated in the coil on getting DC. The power in the coil attracts iron particles.

Effect of AC on Coil

When AC current or Alternate Current or Variable Electric Current is given to a coil, a variable magnetic electric field is generated in the coil. AC voltage in opposite directions is generated due to this variable magnetic field which resists the AC volt.

How to Check Coil?

Place the selector knob of the Multimeter on Diode Sign. Now place the probes on both the terminals of the coil. If a beep sound is produced and the display reads close to 000, it means that the coil is OK. If the display shows 1, it means the coil is open or faulty.


  
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