electromagnet

• Aimant temporaire produit par l'enroulement d'une bobine de fil autour d'un noyau de fer ; le noyau n'est magnétisé que lorsque le courant électrique traverse la bobine.

A temporary magnet created by winding a coil of wire around an iron core; the iron core becomes magnetized only when an electric current flows through the coil.

1. Temporary magnetB2formalscientific

   A device consisting of a coil of wire wrapped around a ferromagnetic core, which becomes magnetized when an electric current passes through the coil and loses its magnetism when the current stops.

   Électroaimant

   • Electromagnets are used in cranes to lift heavy metal objects.
   • The doorbell uses an electromagnet to ring the bell.
   • In a junkyard, an electromagnet can pick up and drop scrap metal.
   • The strength of an electromagnet can be adjusted by changing the current.