sähkömagneto

Sähkömagneto is a Finnish term that translates to "electromagnet" in English. An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the electric current is turned off. Electromagnets are often constructed by wrapping a coil of wire around a core made of a ferromagnetic material, such as iron. When an electric current flows through the wire, it generates a magnetic field that magnetizes the core.

The strength of an electromagnet depends on several factors, including the number of turns in the coil, the amount of current flowing through the wire, and the properties of the core material. Electromagnets are widely used in various applications. They are essential components in electric motors, generators, relays, loudspeakers, magnetic storage devices like hard drives, and in medical equipment such as MRI scanners. Their ability to be switched on and off makes them particularly useful for controlling magnetic forces. In scientific research, electromagnets are used to create strong magnetic fields for experiments. The principle behind the electromagnet was first demonstrated by Hans Christian Ørsted in 1820, who discovered that an electric current could produce a magnetic field.