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Question of units of B, H in Gaussian system

  1. Nov 23, 2011 #1
    In "Classical Theory of Fields", by Landau & Lifgarbagez, they give, for example, the force on a charged particle by a magnetic field as:

    F = [itex]\frac{ev}{c}[/itex] x H

    where H is the magnetic field intensity. Now, normally written in SI units, this expression would use B and no factor of 1/c.

    So how are B and H related here? I'm a bit confused over the units in use (which I think may be Gaussian)!
     
  2. jcsd
  3. Nov 24, 2011 #2

    Meir Achuz

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    In Gaussian units, B and H have the same units (gauss), and are identical in free space.
    For sonme historical reason (and a bit of confusion) H was originally given the unit 'Oersted' with 1 Oersted = 1 Gauss.
     
  4. Nov 24, 2011 #3

    Meir Achuz

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    In Gaussian units, B and H have the same units (gauss), and are identical in free space.
    For some historical reason (and a bit of confusion) H was originally given the unit 'Oersted' with 1 Oersted = 1 Gauss.
     
  5. Nov 24, 2011 #4
    So in Gaussian units, B and H are entirely interchangeable?
     
  6. Nov 25, 2011 #5

    Bill_K

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    In Gaussian units, B and H have the same units (gauss), and are identical in free space.
     
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