An electromagnet is classified as a magnet that runs only on electricity. Unlike permanent magnets, the strength of an electromagnet can be conveniently changed by varying the amount of electric current that goes through it. The electromagnet poles can even be reversed by reversing the flow of electricity.
There are four primary forces in physics, and one of them is called electromagnetism. It is a combination of two forces, electric forces, and magnetic forces. Let us see how these forces can contribute to the electromagnets.
Let us take a look at the everyday conventional uses of electromagnets.
What is induction? It is the phenomenon that takes place when a wire that's near to a changing magnetic field produces electric current. Electric motors, transformers, and power generators all work because of this popular phenomenon called induction. Transformers are critical in this electrical transmission because they are used to step the voltage up or down as needed during its course to the consumers. Electric motors also have the ability to turn electric current into mechanical power in all manner of equipment. This includes toy cars, real cars, washing machines, and power tools. The power generators work like electric motors, but in the other way around: they turn rotary motion into electric power. The rotary motion can come from machinery like windmills, steam turbines or any other sources.
Although you may never see some electromagnets, they are often hidden in many electronic products you use in your day to day life. Press a doorbell, for example, and the electric current creates a magnetic field that attracts a ringer which strikes the bell. Relays are individual electromagnets that usually function like automatic electrical switches. They are found in a variety of consumer and commercial applications, such as TVs, computers, cars, elevators and copy machines. Few of the most powerful magnets in the world exist in MRI machines. Resembling a doughnut, an MRI electromagnet scans patients to create pictures doctors can evaluate.