Describe the process of 'making magnet'
Answers
Answer:
There are several processes for making magnets, but the most common method is called Powder Metallurgy. In this process, a suitable composition is pulverized into fine powder, compacted and heated to cause densification via “liquid phase sintering”. Therefore, these magnets are most often called sintered magnets.
A magnet can produce magnetic fields. These magnets attract unlike poles and repel like poles. Magnets can be made by exposing ferromagnetic materials to the magnetic field. Some examples of ferromagnetic materials are iron and nickel.
Complete step-by-step solution:
By exposing Ferro-magnetic metals such as nickel and iron to magnetic fields it is possible to make magnets.
The three methods that can be employed to make magnets are:
Single touch method
Double touch method
Using electric current.
SINGLE TOUCH METHOD:
In This method, all we need is a permanent magnet and a ferromagnetic material. This is a convenient and simple method that can be used to make small magnets that do not need a large field of attraction.
To begin with, place the ferromagnetic material on top of a surface. Then use the permanent magnet to rub over the surface of the ferromagnetic material. One important caution to be employed here is that the direction of rub should be facilitated in one direction only. Another important note is that after every swipe across the ferromagnetic material, one should take care to lift the magnet from the surface of the material. This process should be repeated over and over, about 50 times. Now, if the process has been completed properly you will notice that the material gets attracted towards the magnet. From this, we can imply that the ferromagnetic material has been magnetized temporarily.
Also, the more times that you rub the permanent magnet over the ferromagnetic material, the more powerful the temporary magnet will become.
DOUBLE TOUCH METHOD
The double touch method is similar to the single touch method here; the only difference is that in this method we use two permanent magnets instead of one. These two magnets are operated on the ferromagnetic substance from opposite directions.
USING ELECTRIC CURRENT
It is possible to make magnets using electricity. These magnets that are made by using electricity are known as electromagnets. To make an electromagnet, tightly coil the copper wire around the iron nail. The ends of the wire should be left free. Now, the lower part is to attach and the upper part of the copper wire is to attach to the negative and positive terminal of a battery respectively. By this method, an electromagnet can be obtained.