How do electromagnets make electric power?

Answer 1

How An Electromagnet Works Featured Articles

• Electromagnet InformationAn electromagnet is a temporary magnet with a magnetic field which is only active when current is running through it. The strength of the magnetic field is also determined by how many coils it has and how much electricity is flowing. The poles of the magnet can also be switched. An iron core can also increase field strength. Electromagnets are used in computers, junkyards, loud speakers, security locks and for many other scientific or electrical purposes.
• Simple Explanation of ElectromagnetsElectromagnets use electricity to create a magnetic field. Electromagnets are important parts both of electric motors and electricity generators. The strength of the magnetic field created by an electromagnet can vary from fairly weak to very strong. A number of factors, including construction method and the strength of the electrical current, affect the strength of an electromagnet.
• How to Make a Working Model of an ElectromagnetElectromagnets are interesting tools. They are magnets created by electricity that can be turned off when not needed. Electromagnets, no matter how large you build them, are made out of a few simple items such as wire, a metal core and electricity. The magnets make great science projects for younger kids and can be made more elaborate for older student with increased electrical knowledge.
• How Does Electromagnetic Force Work?The physical laws governing electromagnetic forces come from the related properties of electricity and magnetism. Changes in electric forces create magnetism, and changes in magnetic forces create electric currents. Light, chemistry, and electric power all depend on electromagnetic forces.
• How Does an Electromagnetic Whiteboard Work?Electromagnetic whiteboards help business professionals create media-rich presentations and offer educators new opportunities to promote interactive learning in schools. Getting the best out of your electromagnetic whiteboard, however, means understanding how its technology works.

Answer 2

Electromagnets do not directly generate electric power. Instead, they are used in devices such as generators and Transformers to convert mechanical energy into electrical energy. In a generator, a magnet spins inside a coil of wire, creating a changing magnetic field which induces an electric current in the wire. In a transformer, electromagnets are used to transfer electrical energy between two separate coils of wire by changing the intensity of the magnetic field.