Category: Physics

An a.c. circuit is one in which the magnitude of the current changes periodically with time. The a.c. is produced […]

Definition of a Capacitor A capacitor can be defined as a device which can store electrical energy. It consist essentially  […]

This device converts mechanical energy into electrical energy. It is a reverse of the electric  motor. It contains a coil […]

This is a device which can convert electric energy into rotational mechanical energy. It consists of coils of wire pivoted […]

The electromagnetic field is a combination of the electric field and the magnetic field. The electric  field component is produced […]

The magnetic field exerts a force on a charge moving in the field because charges in motion constitute an electric […]

n a magnetic needle or a bar magnet is freely suspended, it comes to rest roughly in the N-S poles […]

A magnet is a piece of material that can attract iron and other ferromagnetic material. Generators used in production of […]

Magnetic field is a region around a magnet where magnetic influence is experienced or felt. It is  also a region […]

Electromagnetic Induction Michael Faraday in 1832, at the age of 41 discovered that electricity could be produced without any  battery […]