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. Amphibolic Pathway | Definition | Examples | Pentose Phosphate Pathway

    Jun 06, 24 10:40 AM

    Amphibolic Pathway
    Definition of amphibolic pathway- Amphibolic pathway is a biochemical pathway where anabolism and catabolism are both combined together. Examples of amphibolic pathway- there are different biochemical…

    Read More

  2. Respiratory Balance Sheet | TCA Cycle | ATP Consumption Process

    Feb 18, 24 01:56 PM

    ATP Synthase in Mitochondria
    The major component that produced during the photosynthesis is Glucose which is further metabolised by the different metabolic pathways like glycolysis, Krebs cycle, TCA cycle and produces energy whic…

    Read More

  3. Electron Transport System and Oxidative Phosphorylation | ETC |Diagram

    Feb 04, 24 01:57 PM

    Electron Transport Chains
    It is also called ETC. Electron transfer means the process where one electron relocates from one atom to the other atom. Definition of electron transport chain - The biological process where a chains…

    Read More

  4. Tricarboxylic Acid Cycle | Krebs Cycle | Steps | End Products |Diagram

    Jan 28, 24 12:39 PM

    Aerobic Respiration
    This is a type of process which execute in a cyclical form and final common pathway for oxidation of Carbohydrates fat protein through which acetyl coenzyme a or acetyl CoA is completely oxidised to c…

    Read More

  5. Aerobic Respiration | Definition of Aerobic Respiration | Glycolysis

    Dec 15, 23 08:42 AM

    Aerobic Respiration
    This is a type of respiration where molecular free oxygen is used as the final acceptor and it is observed in cell. Site of Aerobic Respiration - Aerobic respiration is observed in most of the eukaryo…

    Read More