▶Muuqaalka casharka
Elektromagnetic-yada
0:00 / 0:00
Soo dejiso:
Muuji qoraalka
When there is an electric current in a wire, there is a magnetic field around the wire.
When there is an electric current in a coil of wire, the magnetic field around each loop adds to make a stronger field.
An electromagnet is made by wrapping a coil of wire around a core.
An electromagnet is a magnet that can be turned on with an electric current, and turned off.