29 Magnetic Energy Examples: Uses And Detailed Facts


Magnetic energy can be induced using alternating current and an iron rod. In this article we shall see how the magnetic energy is used.

Magnetic energy uses

Following is the list showing different uses of magnetic energy-

Compass

A compass uses magnetic energy to find the magnetic north of Earth. The magnetic North can be used for navigation purposes when we are lost. The GPS is not available in all the places so it is better to keep a compass handy.

MRI scanner

MRI scanner stands magnetic resonance imaging. It is a medical imaging technique that helps us get visuals of physiological processes going inside the body as well as the anatomy of human body. It can be used for research purposes as well as curing patients.

Electric motors

Electric motors convert electric energy to mechanical energy. The motor produces electricity through magnetic force between acting between the poles.

Speakers

Speakers are devices that are used to change the amplitude of sound by converting the sound waves to electrical signals and then back to sound.

Refrigerators

Refrigerators are devices used to cool different things. The capacity of the refrigerator decides what objects can be cooled inside the refrigerator.

Computer

Computers use magnets inside the screens. The CRT monitors use magnets to display content on the screens.

Microwave

Although it is not safe to put magnets inside a microwave. The microwave consists of magnets in the magnetron to direct the electrons to the spot where heating needs to take place.

Cars

In cars, the ABS systems use magnets to keep themselves attached to the car. The type of magnetism is permanent and not like electromagnetism that it would require a source of electricity.

Train

Trains use magnets to push and repel the locomotive. This type of mechanism helps the train to float on the tracks and helps the train to attain very high speeds.

Fans

Electric motors are used inside the fans that are driven by the force of magnets. The electric motor likewise, can be used in other applications like washing machines etc.

Hard disk drive

The magnets are used to corrupt the data in hard disk. Placing a hard disk near a hard disk will render the hard disk useless.

Generators

Generators are devices used to generate electricity. The principle used by the generators is electromagnetism where in the rotation of magnets induce electric currents.

Maglev trains

Mag lev trains as discussed above are trains that run with the help of magnetic energy. The magnets push and repel the trains. The speed of the train depends on how strong the magnetic force is applied. The trains appear to be floating or levitating due to the magnetic repulsion force.

Toy magnets

Toy magnets are available in many sizes and shapes. These are generally used to play or demonstrate the concept of magnetism.

Remote control cars

Remote control cars are also toy cars that has a set of electronics in it. The electronics also include a magnet which is an essential part of the drive train.

Junk yard

Cranes use electromagnets to pick up junk from the junk heap and dump it somewhere else.

Hyperloop

Hyperloop is a concept made for future mode of transportation where in small locomotives will run on the principle of magnetic levitation.

Earphones

Earphones are similar to speakers just small in size. The earphones convert the electric signals to sound.

Makeup

In make up kits, the magnets are used to separate pins from the rest of the make up tools. This way the make up artist would find it convenient to work.

Sewing

In sewing kits also, a magnet is used to separate the needles at one side. This way it becomes easier to handle the needles. The needles are sharp hence we cannot let them get loose somewhere.

Fridge magnet

Some magnets have designs on it and are used as fridge magnets. These magnets can be used for sticking notes or just for the aesthetics.

Pin holder

A pin holder will keep all the pins intact by using a magnet to keeping all the pins together.

Bird navigation

Birds use Earth’s natural magnetic field to navigate through the sky. The birds reach the desired destination with the help of magnetic navigation.

Electromagnetism

Electromagnetism is the concept that explains the relation between magnetism and electricity and that both are dependent on each other. The magnetic field can be induced with the help of electricity and vice versa.

magnetic energy examples
Image: Cross section of a solenoid

Image credits: Geek3VFPt Solenoid correct2CC BY-SA 3.0

Computer screens

CRT monitors use magnets in their screens for displaying the content.

Separating magnetic and non magnetic substance

As we saw the example of make up kit, the magnets can be used at many places to separate magnetic and non magnetic materials.

Induction cooker

An induction cooker is a flame less cooker that works on the principle of electromagnetic induction.

Relays

The relays are used as on/off switches for many applications. It has a magnet which helps it to work properly.

Valves

Valves are also used as on/off switches, their action depends on the magnetic energy.

Transformer

A transformer works on the principle of electromagnetic induction. The transformer is used to step down or step up the voltage.

How is magnetic energy induced form electricity?

The field relating magnetism and electricity is called as electromagnetism. Electricity can be produced by magnetism and vice versa.

When a copper wire is wounded around iron bar and alternating current is passed through the wire, the iron bar starts behaving as a magnet. The iron bar under this configuration is called as solenoid. The magnitude of magnetic energy produced depends on the alternating current passed through the solenoid.

Magnetic potential energy examples

The magnetic potential energy is everywhere, it is the magnitude with which the objects respond.

The following list gives the examples of magnetic potential energy.

  • Rubber ball– In this case, the ball is made of rubber which has no magnetic properties. So the rubber ball will not respond to magnets implying it has a low magnetic potential energy or no magnetic potential energy.
  • Plastic spoon– Similar to rubber ball, plastic spoons also do not respond to magnets implying they have no magnetic potential energy.
  • Metal spoon– A metal spoon responds strongly to the magnetic field making it  an object having high magnetic potential energy.
  • Ball bearings- Ball bearings are made of metals hence they respond very quickly to the magnetic field. This implies they have a very high magnetic potential energy.

Summary

We can conclude that magnetic energy has a lot of uses in industry. We have also seen that magnetic energy can be induce electricity and vice versa.

Abhishek

Hi ....I am Abhishek Khambhata, have pursued B. Tech in Mechanical Engineering. Throughout four years of my engineering, I have designed and flown unmanned aerial vehicles. My forte is fluid mechanics and thermal engineering. My fourth-year project was based on the performance enhancement of unmanned aerial vehicles using solar technology. I would like to connect with like-minded people.

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