Electromagnetism

When a ferromagnetic material is placed in a magnetic field, it is magnetized by induction. If we vary the magnetic intensity H of the magnetic field, the magnetic flux density B in the ferromagnetic material does not vary linearly with H i.e. the susceptibility and the permeability of the material are not constants but vary …

Hysteresis Loop | Loss in Magnetic Material Read More »

  When the flux linking with a coil (or conductor) changes, an EMF is induced in the coil. This EMF can be induced by the following two ways: By rotating the coil in a stationary magnetic field or by rotating a magnetic field in a stationary coil (as in AC and DC generators). The induced …

Mutual | Self Inductance Definition | Formula Read More »

Lenz’s Law   Lenzs law is used to determine the direction of induced emf in the conductor or coil.   According to Lenz’s law, the electromagnetically induced emf and hence current flows in the conductor or coil in such a direction that the magnetic field set up by it always oppose the cause, which produces …

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A closed path followed by magnetic flux is known as a magnetic circuit. In a magnetic circuit, flux starts from one point and finishes at the same point. A magnetic circuit usually consists of magnetic materials having high permeability such as iron, soft-steel, etc. since they offer small opposition to magnetic flux.   The magnetic …

Magnetic Circuit Basics Read More »