Magnetism

Magnets… Produce magnetic fields, invisible forces that repel (push) or attract (pull) some metals Metals affected by magnets include: Iron, nickel, and cobalt or alloys (mixtures) of those metals (steel)

What is a magnetic field? A magnetic field is a line of force Force enters from the south pole Force exits through the north pole

Types of Magnets Permanent: Create their own magnetic field all the time. Temporary: Produce magnetic fields for a short time Electromagnets: Produce a magnetic field when electricity travels through a wire coil

Magnetic Attraction In magnets opposite poles attract and like poles repel North  North North  South South  South

Electromagnet