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Beakman's Electric Motor

  1. May 22, 2003 #1
    Beakman's Electric Motor

    In step 2, it says
    Why we should remove the insulation from one side of the wire while to sand off the insulation from the top half of the other end of the wire? What if we remove all the insulation from both ends of the wire? And what happen if we remove all the insulation of the wire?

    By Flemming's left hand rule, we can work out the polarity of the magnet used.

    I've made this motor before, it's easy to make, and pretty cool!
  2. jcsd
  3. May 25, 2003 #2
    The reason to entirely remove the insulation from one side of the wire is so that it is always in contact with the battery (through the paperclip).
    The reason to remove 1/2 the insulation from the other side of the wire is so the coil (electromagnet) is only on, or active, 1/2 the time. This way you can get the coil-magnet and ceramic-magnet to "push" against each other without them "pulling" each other 1/2 the time, which would keep the coil from spinning.
    Remember if a north-pole end of a magnet is near a north-pole end, it will repel, but if a north-pole end is near a south-pole end it will attract. If we have equal "pulling" and "pushing", the forces will cancel each other out. If we only do one or the other, there is no other force to cancel.
  4. May 26, 2003 #3
    got it! Thank you
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