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Making Of Magnet
 

Making Of Magnet

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    Making Of Magnet Making Of Magnet Presentation Transcript

    • Making Magnets Chapter 22
    • A magnetic object can be made into a magnet by:
      • The Stroking Method
      • The Electrical Method
    • The Stroking Method
      • Also known as the Touch Method.
      • A magnetic object is stroked many times in the same direction with a magnet.
    • The Stroking Method
      • You will need:
      • a magnet
      • a magnetic object
    • Try picking up iron filings with a magnetic object, for example, an iron nail. 1 The iron filings do not cling to the nail.
    • Now, stroke the iron nail about 20 times with one pole of a bar magnet. Stroke with the same pole and always in the same direction! 2
    • Try picking up iron filings with the iron nail again. The iron filings cling to the nail! The iron nail has become a magnet. It has been magnetised! 3
    • The Electrical Method
      • Magnets are made using electricity.
      • Magnets made by this method are called electromagnets.
    • An electromagnet is made by coiling an electrical wire round a magnetic object, e.g. an iron nail many times. The ends of the wire are connected to a battery.
    • Never use electricity from the mains to make an electromagnet! Danger!
    • At a glance…
      • A magnetic object can be made into a magnet by:
        • The Stroking Method
        • The Electrical Method
    • At a glance…
      • The Stroking Method
        • A magnetic object is stroked many times in the same direction with a magnet.
    • At a glance…
      • The Electrical Method
        • An electromagnet is made by coiling an electrical wire round a magnetic object many times. The ends of the wire are connected to a battery.