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Strength of magnetism and electrism

  1. Jan 28, 2015 #1

    can you give me some idea of the quantity of magnetism, electrism and forces involved?

    for example, what is the torque in Nm or the Joules, that I can generate, via a motor perhaps, from a 220V AC motor?

    I want to know how much magnetism and electrism I need to rotate a disc that poses a resistance in rotation of 100Nm


  2. jcsd
  3. Jan 28, 2015 #2


    Staff: Mentor

    We can't answer that until you specify how fast you need to rotate that disk.

    The next step is to calculate the power, which is proportional to speed and resistance. By the way, the resistance will change with speed.

    Then you can match it with a motor capable of supplying that much mechanical power. Motors are usually rated in terms of power, not electric and magnetic field strength.

    On the other hand, if you are interested in electric motor design, a good place to start is Wikipedia electric motors. The references and external links in that article will lead you to additional sources.
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