Let us consider a ferromagnetic material which is subjected to magnetizing field (H). The intensity of the magnetizing field (H) is gradually increased from 0. Then, the magnetic induction (B) also in…
Hall Effect
When magnetic field is applied perpendicular to a current carrying conductor, then voltage is developed across the conductor in the direction perpendicular to both current and magnetic field. This eff…
Moving Coil Galvanometer
Moving coil galvanometer is a device which is used to detect and measure small electric currents present in an electric circuit. Principle It is based on the principle that, “When a current carr…
Derivation of Expression for Torque on a Rectangular Coil
Let us consider a rectangular coil PQRS of length ‘l’ and breadth ‘b’ suspended in uniform horizontal magnetic field ‘B’. Let the plane of the coil make an angle &#…