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Homework Help: How does this kind of DC motor work?

  1. Aug 14, 2013 #1
    1. The problem statement, all variables and given/known data
    I used a similar motor to this one in a prac, and then realised that the arms either side of the coils were not magnetised. I was wondering where the magnetic field comes from, and without any special equipment is it possible to calculate it?


    2. Relevant equations
    t=bain
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Aug 14, 2013 #2

    rcgldr

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    Homework Helper

    Isn't the purpose of the coil at the bottom of the motor to produce a magnetic field?
     
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