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Magnetism

Magnetism. Non-contact forces . A non-contact force acts through a region of space called a force field . In regards to gravity: Gravitational Field When we talk about magnets and the way they interact with objects we need to understand their: Magnetic Field. Magnets.

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Magnetism

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  1. Magnetism

  2. Non-contact forces • A non-contact force acts through a region of space called a force field. • In regards to gravity: • Gravitational Field • When we talk about magnets and the way they interact with objects we need to understand their: • Magnetic Field

  3. Magnets. • I want you to get one of the magnets and the magnetic field plate. • Place the magnet on the plate • In your book I want you to draw a diagram to represent what you see on the plate. • In your books I want you to describe the way the magnet interacts with the metal. Describe what you think the structure of the magnet is.

  4. Magnetic Fields • A Magnet pulls or Attracts materials containing: • Iron, Cobalt and Nickel • Things are only attracted when they are positioned within an objects magnetic field • The magnetic field is “The space around a magnet where a magnetic force is experienced” • Magnets ends are called “poles”. • When placed in water the one that rotates to point north is called the North Pole • The opposite end is the South Pole

  5. Magnetic Field lines: • Show the direction that a compass would point • Always run from the north pole to the south pole • Do not cross • Represent a strong magnetic field when they are bunched together • Represent a weak magnetic field when they are spread apart

  6. Earths Magnetic Field http://www.youtube.com/watch?v=FcfWsj9OnsI http://www.youtube.com/watch?v=izYiDDt6d8s

  7. Attraction and repulsion • Magnetic Poles may be attracted to each other: • Complete the following table and then write a statement to describe what is happening. “Like poles will repel each other away, whereas Opposite poles will attract.”

  8. Types of Magnets • There are two types of magnets: • Temporary: Those that act as a magnet for a short period of time (Electromagnets) • Permanent: Magnets that are magnetic for a long period of time http://www.youtube.com/watch?v=noGGcyPHtdI

  9. http://www.youtube.com/watch?v=aIwbrZ4knpg

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