ELECTROMAGNETS

MAGNETS REVIEW

• Magnets have poles. What are they called?
• Do like poles repel or attract each other?
• Do unlike poles repel or attract each other?

What is an electromagnet?
Look at the first part of the word...electro.
What do you think that might mean?

NEW VOCABULARY

• Electromagnet- a core of magnetic material (such as iron) surrounded by a coil of wire through which an electric current is passed to make a magnet
• Field line- imaginary line in a field of force
• Relay- switch that uses electromagnets