Electromagnet Notes Flashcards
What is a bar magnet?
a rectangular object that sticks to iron or steel
What is a circuit?
a pathway for the flow of electricity
What is a compass?
an instrument that uses a free-rotating magnetic needle to show direction
What is a core/rivet?
in an electromagnet, the material around which a coil of insulated wire is wound
What is an electric current?
the flow of electricity through a conductor
What is an electromagnet?
a piece of iron that becomes a temporary magnet when electricity flows through an insulated wire wrapped around it
What is a magnetic field?
an invisible field around a magnet
What is magnetism?
a property of certain kinds of materials that causes them to attract iron or steel
What is plastic insulation?
a coating around a wire that keeps an electric current along the pathway of the wire
What is steel?
a hard, strong, gray or bluish-gray mixture of iron, carbon, and usually other substances.
