1. Feb 7, 2015 #1

   Tesla Gwon

   

   Maxwell's equation is
   
   ∇×H=J + ...
   
   but the unit of H is A/m while J's unit is A/m²
   
   as quoted from wikipedia
   
   how can it be possible?

    

   Tesla Gwon, Feb 7, 2015
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3. Feb 7, 2015 #2

   phyzguy

   

   Science Advisor

   You're taking the derivative of H, and this involves dividing by a length. The components of Curl(H) has terms like partial(H)/partial(x), so there is an additional length in the denominator. This is just like the fact that the units of velocity are m/s, while the units of acceleration (which is the time derivative of velocity) are m/s^2.

    

   phyzguy, Feb 7, 2015
4. Feb 7, 2015 #3

   Tesla Gwon

   

   i see ! thank you very much

    

   Tesla Gwon, Feb 7, 2015

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