HOW DOES AN ELECTROMAGNET WORK?
The basic idea that rests behind all electromagnets would be exceedingly simple: By running electric current all through a wire, a magnetic field can be created. The magnetic field will then disappear once the current ceases. To give you an idea, the simplest form of a true electromagnet would be a coiled wire. An electromagnet basically begins with a battery (even other sources of power may be used) and a wire. If you attach a wire straight from the positive to the negative terminals of a typical D-cell, the electrons flows to the positive end rapidly and the battery quickly drains. Thus typically some sort of load (like a light bulb) is connected in the middle of your wire. A small magnetic field is thus generated. A great deal stronger magnetic field may be obtained if a “core” of certain paramagnetic or ferromagnetic material (frequently soft iron) is positioned inside the coil. The current which in effect flows through a given wire results in a magnetic field which forms around th
