Electromagnetic Induction

And how it works.



Apparatus for demonstrating electromagnetic induction, 1889.. Photograph. Britannica ImageQuest, Encyclopædia Britannica, 25 May 2016. quest.eb.com/search/102_536271/1/102_536271/cite. Accessed 7 Dec 2021.

By: Zakaria Najmeddine, Journalist

The discovery of electromagnetic induction has led to the dawn of the industrial revolution and has helped create convenient devices such as charging pads and electric motors. Electromagnetic induction, in simple terms, is the process of making an electric current with a magnetic field. This phenomenon was discovered by Michael Faraday in 1813. He found that if you pass a magnet within a coil, an electric current is created.

In the charging pad used for phones, electromagnetic induction is present. There is an alternating current inside the charging pad, which means that the direction of the magnetic field changes. There’s also a coil inside the charging pad that responds to the changing magnetic field of the coil. A voltage is created because of the changing magnetic field. The voltage transfers to the phone, which then charges the battery.

In an electric motor, a horseshoe magnet, called a stator, surrounds a turning coil of wire called an armature. The armature carrying a current supplied by the battery becomes an electromagnet because a wire carrying a current becomes an electromagnet. The way to get motion from the wire is to position the wire within the magnetic field of the stator. The armature begins to experience motion because of the exchange of the magnetic fields and particles (electrons flowing through the current) which results in the torque of that spins the armature. This spin is used in fans, power tools, and other household appliances.

To conclude, electromagnetic induction is very handy when it comes down to producing¬† innovative technology. Electromagnetic is present in things we use daily and we don’t even notice it.