Electromagnets

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Electromagnets are mostly copper wire coils usually wound around an iron core to create a magnetic field. Electromagnets control field polarity, field shape and the density of the magnetic flux.

The purpose of an electromagnet is to create a magnetic field by running electrical currents through a wire. Many different things can be created this way such as motors, speakers, hard disks and tape drives. The invention of the electromagnet has contributed hugely to our technological development.

A simple electromagnet can be made through using a battery, or any power source, and a wire. Electrons are needed from the battery. The negative ends of the battery are where electrons are located, and they will naturally flow to the positive side if allowed. The wire and the electrical current will aid the electrons to move freely from the negative to the positive side of the battery. Connect a load (a motor, light bulb or radio) into the center of the wire to allow these flowing electrons to power the load and have a useful objective. A magnetic field will thus be generated and an electromagnet will be born.

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