Magnet and Magnetism

Magnet and Magnetism are utilized for operating all kinds of electrical machines. Hence we should have a deep concept of magnets and magnetism. The property of a magnet is called magnetism. The magnet is an element which can attract magnetic materials. Normally a magnet can attract iron, cobalt, steel, nickel. If a magnetic piece is … Read more

Magnetic Susceptibility

Before defining the term magnetic susceptibility, we need to know some terms such as magnetic field (H), magnetic flux density (B) and magnetic permeability (µ) Magnetic field : Lines of force will be produced which diffuses through the medium where the field is applied. Magnetic flux density : The amount of lines of force per … Read more

Magnetic Flux

We define magnetic flux as the total number of magnetic lines of force in a magnetic field. If we place an imaginary isolated unit north pole in a magnetic field it will experience a repulsive force from north pole and an attractive force from south pole of the magnet which has created the field. Due … Read more

Magnetic Saturation

If we increase the mmf of a magnet, the flux density inside the core to of the is also increased. Now we can ask a question, whether there is any limitation of increasing flux density in the core of magnet with increasing applied mmf. The answer is yes. There is a limit beyond which there … Read more

Magnetic Permeability

Definition of Magnetic Permeability Magnetic permeability is the ability of a material to respond to how much electromagnetic flux it can support to pass through itself within an applied electromagnetic field. In other word magnetic permeability of a material is the degree of magnetization capability. Notation of Magnetic Permeability Magnetic permeability is expressed in μ … Read more

Electromagnetic Theory

Electromagnetism is the phenomenon which deals with the interaction between an Electric field and a magnetic Field. Stationary charges in a system lead to an electric field and moving charges in a system lead to a magnetic field. The direction of electric field and Magnetic field is always perpendicular to each other, and the wave … Read more

A Current Carrying Conductor within a Magnetic Field

Oersted had established that a compass needle gets deflected in the vicinity of a current carrying conductor i.e. this conductor exerts a force on the compass needle. Later on, in the year 1821, Michael Faraday discovered that a current carrying conductor also gets deflected when it is placed in a magnetic field. This can be … Read more

Magnetic Circuit with Air Gap

Magnetic Circuit When a magnetic flux is circulated or follow through a closed area or path, is called the magnetic circuit or when a magnetic field circulates in a closed path represented as lines of magnetic flux in a confined area is called Magnetic Circuit. This magnetic circuit forms with permanent magnets or electromagnets and … Read more

Energy Stored in a Magnetic Field

Magnetic field can be of permanent magnet or electro-magnet. Both magnetic fields store some energy. Permanent magnet always creates the magnetic flux and it does not vary upon the other external factors. But electromagnet creates its variable magnetic fields based on how much current it carries. The dimension of this electro-magnet is responsible to create … Read more

Magnetic Field and Importance of Magnetic Field

The magnetic field is a field, produced by electric charges in motion. It is a field of force causing a force on material like iron when placed in the vicinity of the field. Magnetic field does not require any medium to propagate; it can propagate even in a vacuum. Also, the energy storing capacity of … Read more