emf

[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.

 

[circulus vitios]

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

 

[costales]

"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.

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.