Magnetization and Demagnetization

We will discuss here about magnetization and demagnetization.

What is magnetization?

The method of developing the properties of a magnet in a magnetic substance is known as magnetization. A magnetic substance like a piece of iron can be magnetized by electric current or by touching with a magnet. We know about the method of preparing an electromagnet and now we will discuss about the method of preparing a magnet by direct contact.

Magnetization by Direct Contact

Take an ordinary bar (AB) made of iron magnetic substance).

Place it on a table and hold it firmly with left hand. Now take a strong magnet bar. Hold it with right hand in a fixed inclined position. Bring one pole of the bar magnet in contact with end A of the iron bar as shown in the figure. Now rub it down to end B of the bar along the surface. Repeat the process several times. After a few minutes the iron bar will turn into a magnet bar.


What is demagnetization?

The method of removing of the magnetic properties of a magnet is known as demagnetization. It can be done by the following methods:

1. Hitting a magnet heavily by hammer.

2. Heating a magnet at high temperature.

3. Placing two magnets with same poles facing each other.


The following uses of magnet are:

(i) Magnet is used to prepare mariner’s compass.

(ii) Electric bell and air pumps used in aquarium, are prepared with electromagnet.

(iii) Magnet is the main component of all types of speakers, telephone receivers, head phones etc.

(iv) Magnet is used to fix the door of a refrigerator.

(v) In factories heavy iron articles are lifted by very strong electromagnets

(vi) Specially designed electromagnets are used to remove iron fillings from the eyes.




Fifth Grade

From Magnetization and Demagnetization to HOME PAGE

New! Comments

Have your say about what you just read! Leave me a comment in the box below.


Recent Articles

  1. Characteristics of Plant Growth Regulators | Definition | Functions |

    Apr 27, 25 01:21 PM

    Plant Growth Regulators
    Definition of plant growth regulators- This are very small molecules synthesized from the cells of different parts which are associated with the plant cell growth. Growth in unicellular organism emplo…

    Read More

  2. Plants Development | Definition | Leaf Development | Factors Affecting

    Apr 22, 25 02:31 PM

    Definition of development- development is a biological process which can be defined as the process in which there is sequence of qualitative changes towards a higher or more Complex state.It consists…

    Read More

  3. Differentiation, Dedifferentiation and Redifferentiation | Definition

    Apr 21, 25 01:16 PM

    Differentiation
    Cells from the root apical meristem and shoot apical meristem the camera that differentiate , mature to perform different functions. This process by which the cells undergo different major structural…

    Read More

  4. Explain about Growth in Plants |Definition of Growth & Differentiation

    Feb 27, 25 02:07 PM

    Phases of Growth
    Growth is a permanent increase in length or volume of an organism that brought upon by an increase in its dimensions due to synthesis of new protoplasmic material.

    Read More

  5. Definition of Respiratory Quotient | calculation | Application | Plant

    Dec 02, 24 12:09 AM

    Definition of respiration quotient- the ratio of the carbon-dioxide evolved to that of the oxygen consumed by a cell, tissue, plants or animals in a given time is called respiratory quotient. It is us…

    Read More