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What is the difference between electric field and magnetic field

  1. Aug 12, 2012 #1
    What is the difference between electric field and magnetic field
     
  2. jcsd
  3. Aug 12, 2012 #2
    Re: Electromagnetisms

    From a special relativistic perspective, nothing--they're just different aspects of the same combined EM field, components that arise from different kinds of currents.

    I suspect this isn't the answer that would help you most, though. Perhaps you have a more specific question in mind?
     
  4. Aug 12, 2012 #3
    Re: Electromagnetisms

    [tex]\nabla \circ \vec{E} = \frac{\rho}{\epsilon_{0}}[/tex]
    [tex]\nabla \times \vec{E} = -\frac{{\partial}{\vec{B}}}{{\partial}{t}}[/tex]
    vs.
    [tex]\nabla \circ \vec{B} = 0[/tex]
    [tex]\nabla \times \vec{B} = \mu_{0} \vec{J} + \mu_{0} \epsilon_{0} \frac{{\partial}{E}}{{\partial}{t}}[/tex]

    heh, sorry, I couldn't resist..
     
  5. Aug 13, 2012 #4
    Re: Electromagnetisms

    classically electric fields are caused by charge and magnetic fields are caused by moving charges in the static case. and if I have a time-varying E or B field they can induce the other field. And my relative motion with some stationary charge I could see a B field in my frame or an E field depending on the configuration.
     
  6. Aug 14, 2012 #5
    Re: Electromagnetisms

    This is not the complete story, please include Lorentz Force equation. To make difference
    between E and B, it is very important to remember how do they interact with some particle, that is the only way to know about them( E or B).
     
  7. Aug 14, 2012 #6
    Re: Electromagnetisms

    as sanjib ghosh is getting at. The E field will affect a charged particle at rest by a B field will not cause a charged particle at rest to move.
     
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