This type of filament is used in light bulbs. An electric current can produce a magnet. When an electric current is run through a wire a magnetic field is created around the wire. A coiled wire creates a stronger magnetic field. If an iron rod is placed in the middle of the coiled wire an electromagnet is created.
Electromagnets are magnets created from an electric current.
Electromagnets are used to run large electric motors. Electricity travels through a path called an electric circuit. B. An open circuit is a circuit that is not complete. There is a break in the circuit that does not allow the electric current to flow. When a light is turned off, an open circuit is created.