Magnetic Circuit

A magnetic circuit is known as a closed-loop followed by a magnetic flux. A magnetic circuit is made of core materials having high permeability like iron, soft steel, paramagnetic, etc. which we already discourse in the previous post, these materials offer very small opposition to the flow of magnetic flux.

 Considered a coil of N turns wound on an iron core When an electric current is passed through the coil, magnetic flux (ψ) is set up in the core as so in the image.1.

Series Magnetic Circuit

When the same magnetic flux ψ flows through each part of the magnetic circuit, then the circuit is called a series magnetic circuit.

Consider a composite series magnetic circuit (a series magnetic circuit that has parts of different dimensions and materials is called a composite series magnetic circuit) consisting of two different magnetic materials of different relative permeability. Each part of this series magnetic circuit will offer reluctance to the magnetic flux ψ. Since the different parts of the magnetic circuit are in series, the total reluctance is equal to the sum of the reluctance of individual parts.

Parellal Magnetic circuit

A magnetic circuit that has more than one path for the magnetic flux is called a parallel magnetic circuit.

Consider a coil of N turns wound on limb AF carries an electric current of I amperes. The magnetic flux φ1${\phi }_1$ set up by the coil divides at B into two paths viz.