sähkömagneetti

Sähkömagneetti is the Finnish word for electromagnet. An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. Electromagnets usually consist of a wire wound into a coil. A current passed through the wire generates a magnetic field. This magnetic field is localized around the coil.

The strength of the magnetic field produced by an electromagnet can be varied by changing the amount of electric current that flows through the wire. It can also be changed by varying the number of turns in the coil. Typically, the magnetic field disappears when the electric current is turned off. This temporary nature is what distinguishes electromagnets from permanent magnets.

Electromagnets are widely used in various applications. They are found in electric motors, generators, relays, loudspeakers, and magnetic storage devices such as hard drives. Their ability to be switched on and off makes them indispensable in many technological systems. Lifting magnets, used in scrap yards to move heavy iron objects, are a common example of electromagnets in action. The magnetic field is generated by passing a current through a coil of wire, and this field is strong enough to attract and hold large metal objects. When the current is switched off, the object is released.