Creating and Removing Magnetism
Magnets are objects that have the ability to attract other objects around them. Magnets have many functions that help human work, including attracting small metal objects, generating electricity, as directions and so on. Magnets have two poles, a north pole and a south pole. The magnetic pole is the area around the magnet that has the strongest attraction. The properties of magnetic poles are that if similar poles are brought close they will repel, whereas if opposite magnetic poles are brought close they will attract each other.
Types of magnets
Magnets have various types according to their categories, namely:
Types of magnets by origin
Based on their origin, magnets can be divided into natural and artificial magnets. Natural magnets are magnets that are found in nature and have been formed without any human intervention. While artificial magnets are magnets made by humans with the aim of making work easier.
Types of magnets based on properties
Based on its properties, magnets are divided into two, namely permanent magnets or permanent magnets, which are magnets that have magnetic properties for a long period of time. Meanwhile, temporary magnets are magnets whose magnetic properties will appear when they are made and will easily disappear when the manufacturing process is stopped.
Make magnetic properties
There are three ways to make a temporary magnet, namely:
Rubbing
To obtain a temporary magnet, we can make it by rubbing iron or steel with a permanent magnet repeatedly. How to rub is done in the same direction or not back and forth. To determine the magnetic poles, the end of the iron or steel rod that is first rubbed has the same pole as the pole of the magnet that is rubbing it.
Induction
What is meant by induction is bringing the iron or steel that will be made into a magnet closer to a permanent magnet. To determine the poles of a temporary magnet, the tip of an iron or steel that is brought near to a permanent magnet will have properties that are opposite to the poles of a permanent magnet.
Direct electric current (DC)
Magnets made by the flow of electricity are also called electromagnets. A simple way to make an electromagnet is to make a coil of wire/coil as a coil of iron or steel that will be used as a magnet. Furthermore, the wire coil was connected to the battery as a source of electric current. When the wire coil is energized, the iron or steel in the coil becomes magnetic.
Removes magnetic properties
Besides being able to be made, magnetic properties can also be removed in three ways as follows:
Beaten
The magnetic properties of an object can be lost if it is hit with a hard object such as a hammer. Magnetic objects can also be struck continuously against other hard objects, such as floors or walls to remove their magnetic properties.
heated
Magnets can turn into non-magnetic objects by being heated or burned, causing the object to get excessive heat energy so that its magnetic properties are lost.
Alternating current (AC)
If the manufacture of temporary magnets can be done by flowing direct current (DC), then to remove the magnetic properties can be done by flowing magnetic objects with alternating current (AC) so that the magnetic properties of objects will disappear.