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Unit 5 Electricity & Magnetism

Unit 5 Electricity & Magnetism. Standards - S8P5c - Magnetism, S8P5b - Electrical Circuits, S8P5c - Electromagnetism. Magnets. Any material that attracts iron and materials that contain iron. The attraction or repulsion of magnetic materials is called magnetism.

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Unit 5 Electricity & Magnetism

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  1. Unit 5Electricity & Magnetism Standards - S8P5c - Magnetism, S8P5b - Electrical Circuits, S8P5c - Electromagnetism

  2. Magnets • Any material that attracts iron and materials that contain iron. • The attraction or repulsion of magnetic materials is called magnetism. • One part of a magnet will always point north when allowed to swing freely.

  3. Magnetic Poles • One of two ends of a magnet where the magnetic effect is strongest. • North pole points north. Other pole is called South pole.

  4. Magnetic Interactions • Magnetic poles that are unlike attract each other, and magnetic poles that are alike repel each other.

  5. Magnetic Force • The attraction or repulsion between magnetic poles; can cause an object to move.

  6. Magnetic Fields • The area of magnetic force around a magnet. • Magnetic field lines are invisible lines that map out the magnetic field around a magnet, and spread out from one pole, curve around the magnet, and return to the other pole. • Magnetic fields can be single or combined.

  7. Single Magnetic Field

  8. Combined Magnetic Field

  9. Magnetic Domains • A grouping of atoms that have their magnetic fields aligned; acts like a bar magnet with a north pole and a south pole.

  10. Alignment of Domains • In a magnetized material, all or most of the magnetic domains are arranged in the same direction.

  11. Magnetic Materials • A material that shows strong magnetic properties is said to be a ferromagnetic material.

  12. Making Magnets • Magnets can be made from ferromagnetic material. • They can be temporary (easily loses its magnetism) or permanent (keeps its magnetism for a long time)

  13. Changing Magnets • Magnets can be destroyed when they become un-magnetized by dropping, heating, or striking them. • Magnets can be broken apart to have two smaller magnets with their own north and south poles

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