What Is Electromagnetic Induction?

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Imagine you're a kid, and you're sitting in your bedroom playing with a set of batteries. You have a battery in one hand and another in your other hand. You connect the two, and they start to spin around each other. You do it repeatedly—and pretty soon, you've built yourself a little toy car. That's electromagnetic induction for you! Michael Faraday discovered this principle in 1831 when he noticed that when he put one end of an iron bar near a magnet, the bar would move toward or away from the magnet as he moved it closer or farther away. That's because an electric current flowed through the iron bar, which made it magnetic too! A circuit illustrates the principle of electromagnetic induction with alternating current generating another current in an adjacent course without being directly linked. Generally credited to Michael Faraday (who came up with it), electromagnetic induction has been applied to different systems as an electromotive force across an electrical conductor in a changing magnetic field. Imagine a train floating in the air. It's not connected to anything but the track it runs on and floats above the ground. Now imagine that you're riding on that train. Did you know that even though you may not feel like you're moving, you are? This phenomenon is made possible thanks to electromagnetic induction, which is the principle behind the operation of a maglev train. If you've ever had the opportunity to ride on one of these trains, they appear to float above the track, evading any potential friction or resistance that could hinder their movement. This makes them really fast and efficient—and also really cool! This phenomenon happens thanks to electromagnetic induction: when an electric current is run through a wire, it causes a magnetic field around it. When that magnetic field comes into contact with another metal object (like a piece of metal track), an opposing force is created between the two materials that push back against gravity and keep everything from falling toward Earth's surface!

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