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Generating Electricity
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The movement of a bar magnet into a wire coil attached to an ammeter is one of Englishman Michael Faraday's famous demonstrations. Here are the basic observations:
 
  | Here the magnet is being pushed into the coil. The ammeter shows current induced in a positive direction.  |  
  | Now the magnet is stationary inside the coil. There is no current being produced in the coil, shown by the zero reading on the ammeter  |  
  | Finally the magnet is being pulled out. The ammeter shows current being induced in the opposite direction to before.  |   
 
 
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