Inductors

 

1) By coiling wire we can increase strength of magnetic field created by current. This is called an inductor.

2) A large inductor functions as an electromagnet.

3) Strength of the magnetic field depends on number of coil turns, coil size, coil spacing, winding arrangement, core material, and shape of inductor.

4) Inductors resist changes in current flow, because of the induced charge of the expanding or contracting magnetic field.

5) Inductors like to pass DC and don't like passing AC.

6) Induction is measured in Henrys.

7) Example - Car detection at stop light.

7) Common use - Filter.

 

 

 

 

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