Magnetism

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Magnetism

  1. 1. Magnetism Revision
  2. 2. Law of Magnetism <ul><li>Like poles repel </li></ul><ul><li>Unlike poles attract </li></ul>
  3. 3. Law of Magnetism <ul><li>Like poles repel </li></ul><ul><li>Unlike poles attract </li></ul><ul><li>If a magnet repels an object, that object is a magnet. </li></ul><ul><li>If a magnet attracts an object, the object might be a magnetic material OR Magnet . </li></ul>
  4. 4. Compass <ul><li>The arrow of the compass is the North Pole </li></ul>
  5. 5. Compass <ul><li>The arrow of the compass is the North Pole </li></ul>S N
  6. 6. Induced Magnetism <ul><li>Explains how a magnet attracts a magnetic material </li></ul><ul><li>Magnetic induction is a process in which, an magnetic material is magnetized when placed in a magnetic field. </li></ul><ul><li>There must be induction before an magnetic object is attracted to an magnet </li></ul>
  7. 7. Magnetic Field <ul><li>A region in which the magnetic effect is felt </li></ul><ul><li>The direction of the magnetic field lines is from North pole to South Pole. </li></ul>
  8. 8. Magnetic Field
  9. 9. Permanent /Temporary Magnet <ul><li>Permanent Magnet (made up of steel) retain magnetism. Used in compass and door latch </li></ul><ul><li>Temporary Magnet (made up of iron) loses magnetism. Used in electromagnet. </li></ul>

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