![]() As you know, magnets have two poles, "north" and "south," and attract things made of steel, iron or some combination thereof. Electromagnets are useful because you can turn the magnet on and off by completing or interrupting the circuit, respectively.īefore we go too much farther, we should discuss how electromagnets differ from your run-of-the-mill "permanent" magnets, like the ones holding your Popsicle art to the fridge. This creates a magnetic field around the coiled wire, magnetizing the metal as if it were a permanent magnet. A current is introduced, either from a battery or another source of electricity, and flows through the wire. But you don't have to wait for a storm to bring an electromagnet to life. Like Frankenstein's monster, this seems like little more than a loose collection of parts until electricity comes into the picture. ![]() It consists of a length of conductive wire, usually copper, wrapped around a piece of metal. Mechanically, an electromagnet is pretty simple. And when someone rings your doorbell, a tiny electromagnet pulls a metal clapper against a bell. Your favorite band uses electromagnets to amplify the sound coming out of its speakers. Wrecking yards employ extremely powerful electromagnets to move heavy pieces of scrap metal or even entire cars from one place to another. What do a wrecking yard, a rock concert and your front door have in common? They each use electromagnets, devices that create a magnetic field through the application of electricity. ![]() Need to sort out some scrap metal? Electromagnets to the rescue! Here, an electromagnet is used to pick up some of the approximately 3,500 confiscated guns to be melted down. ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |