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Lecture 11: Inductors, RL filters and Transformers.Introduction to working principle of inductor
In Electromagnetism, when an electrical current flows through a wire conductor, a magnetic flux 
is developed around that conductor.The Inductor
An Inductor is a passive electrical component consisting of a coil of wire which is designed to 
take advantage of the relationship between magnetism and electricity as a result of an electric 
current passing through the coil.This effect produces a relationship between the direction of the magnetic flux, which is 
circulating around the conductor, and the direction of the current flowing through the same 
conductor.But unlike capacitors that store energy as an electric field, 
inductors store their energy as a magnetic field.Like a capacitor, inductors store energy.These lines of force start to extend further and further 
outward.The more current traveling through the wire the greater the 
amount of flux lines will be present.