Y8 Rotation 1 Physics Magnets

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Author:
HLHSscience
ID:
219569
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Y8 Rotation 1 Physics Magnets
Updated:
2013-05-14 11:51:45
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Y8 Rotation Physics Magnets
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Y8 Rotation 1 Physics Magnets
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  1. What are the names of the two poles of a magnet?
    North and south.
  2. Which is the most common magnetic metal?
    • Iron.
    • Nickel and cobalt are also magnetic.
  3. What will a north pole do to another north pole?
    Repel.
  4. How do two south poles interact?
    They repel each other.
  5. How do a north and a south pole react to each other?
    They attract.
  6. How can an iron nail be turned into a magnet?
    By stroking a permanent magnet across it.
  7. How can a magnet be demagnetised?
    By disrupting the domains. This can be done by hitting it or by heating it.
  8. What is the name given to the tiny parts that are lined up in a magnet?
    Domains.
  9. How are domains organised in a non-magnet?
    Randomly.
  10. How are domains organised in a magnet?
    All lined up with each other.
  11. What are the lines that are formed around a magnet called?
    Field lines.
  12. How can an electromagnet be made?
    By wrapping a current carrying wire around a coil.
  13. What are the possible uses of an electromagnet?
    Picking up things in a junkyard, sorting metals in a factory or recycling plant, and releasing and locking doors.
  14. Why is an electromagnet better than a regular magnet?
    They can be more powerful and they can be turned on and off.
  15. How can an electromagnet be made stronger?
    Bigger current, more coils, or better quality core.
  16. How does a MagLev train float?
    Magnets in the track and train repel each other.
  17. What are the benefits of MagLev trains?
    They have reduced friction between the train and the track so they waste less energy and make less noise.
  18. Why can wood never be a magnet?
    It does not contain domains.

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