JoeF09

What was the most important invention of all time? The Electromagent

The Electromagnet was invented in 1823 by a British inventor named William Sturgeon. Sturgeons first electro magnet that he made was in the shape of a horseshoe. It was a piece of iron with around 18 turns of bare copper. His first electromagnet was a horseshoe-shaped piece of iron that was wrapped with about 18 turns of bare copper wire, this is because insilated wire hadn't existed yet. when a current passed through the coil, the iron became magnetized, and when the current was cut off or stopped, the iron was demagnetized. When it was initially put to the test it weighed only 7 ounces but could lift up to 9 pounds. this was just with the current of a single-cell battery. media type="youtube" key="DC-DKSOdwKw" height="344" width="425"This video is one of the many useful ways that an electromagnet is useful. In this case this flashlight never ever needs batteries so it will be working for a long, long time.