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I Net force on a Halbach Array in a uniform magnetic field

  1. Jun 11, 2017 #1
    I have been unable to determine whether a Halbach Array of permanent magnets would experience a net force in a uniform magnetic field.
     
  2. jcsd
  3. Jun 13, 2017 #2

    mfb

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    Without motion, the only thing that experiences a net force in a uniform magnetic field would be magnetic monopoles, and they haven't been observed (as free particles) yet.
     
  4. Jun 13, 2017 #3
    Is that true? How about the classic compass needle? It's a normal dipole and it experiences a rotational force in a (to a first degree) uniform field.
     
  5. Jun 13, 2017 #4

    mfb

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    It is only torque, it is not a net force (that would accelerate the center of mass).
     
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