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emf

Discussion in 'MCAT Study Question Q&A' started by destroyMCAT, Aug 7, 2011.

  1. destroyMCAT

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    "In order to produce a current in an electric circuit, a potential difference or emf is required. This emf may arise from a chemical process, an external electric field, or magnetic induction." How is there an emf/potential difference in magnetism. I know that there is potential difference in electrostatics when one moves the ion from higher/lower to higher/lower potential.. but I'm having a hard time understand the emf/potential difference in magnetism.
     
    #1 destroyMCAT, Aug 7, 2011
    Last edited: Aug 7, 2011
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  3. circulus vitios

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    Faraday's Law says an EMF is induced whenever the magnetic flux changes.
     
  4. costales

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    The real explanation is fundamental: A changing magnetic field produces an electric field. This induced field is not associated with charges but only with a changing magnetic flux. For purposes of MCAT, just treat it as an experimental finding described by Faraday's law.
     

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