elektromagnetidega

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. Electromagnets usually consist of a coil of wire, and an iron core. When electric current is passed through the coil, it generates a magnetic field. The strength of the magnetic field can be varied by changing the amount of electric current flowing through the coil or by changing the number of turns in the coil. The magnetic field disappears when the electric current is turned off.

The principle of electromagnetism was discovered by Hans Christian Ørsted in 1820. He observed that an electric current could deflect a compass needle, indicating the presence of a magnetic field. Later, André-Marie Ampère further developed the understanding of the relationship between electricity and magnetism, leading to the development of the electromagnet.

Electromagnets have numerous applications in modern technology. They are used in electric motors to create rotational motion, in loudspeakers to convert electrical signals into sound waves, and in magnetic resonance imaging (MRI) machines for medical diagnostics. They are also found in doorbells, relays, magnetic separators, and in various industrial lifting and sorting processes. The ability to control the magnetic field by simply switching the current on and off makes electromagnets incredibly versatile tools.