Magnetization and Demagnetization
The method of developing magnetic properties inside a magnetic substance is known as magnetization. With the aid of an electric current or a powerful magnet, any magnetic material may be magnetised.
- In simple terms, if any magnetic substance is placed in an external magnetising field, the material will become magnetised, and if the external magnetising field is reversed, the material will become demagnetized.
- When ferromagnetic materials are put inside a current-carrying coil, the magnetising field H produced by the current pushes some or all of the material’s atomic magnetic dipoles to align with the external magnetising field, magnetising the material.
Hysteresis Loop
Hysteresis Loop– In a system with a magnetic field, hysteresis occurs. Ferromagnetic materials have a common characteristic called hysteresis. The hysteresis effect is a phenomenon that occurs when the magnetization of ferromagnetic materials lags behind the magnetic field. The word hysteresis means “lagging.” Magnetic flux density (B) lags after magnetic field strength, resulting in hysteresis (H).
Hysteresis is a property of all ferromagnetic materials. Let’s look at an example where a ferromagnetic material is placed within a current-carrying coil to better grasp the notion. The material becomes magnetized as a result of the magnetic field present. Hysteresis is known as the process of demagnetizing a material by reversing the direction of the current.
Table of Content
- Hysteresis Loop
- Difference between the soft magnets and hard magnets
- Magnetization and Demagnetization
- Sample Problems