Harnessing Electricity from Magnets: Understanding the Impact of Polarity

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SUMMARY

The discussion clarifies that electricity generation through a wire in a magnetic field is primarily influenced by changes in magnetic flux rather than the polarity of the magnet. Specifically, when a wire is placed next to an AC-powered electromagnet, the alternating polarity results in a varying magnetic flux, which induces an alternating current (AC) in the wire. This principle is rooted in Faraday's law of electromagnetic induction, emphasizing that the key factor is the change in flux, not the magnetic polarity itself.

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  • Understanding of Faraday's law of electromagnetic induction
  • Basic knowledge of alternating current (AC) and electromagnetism
  • Familiarity with magnetic flux concepts
  • Experience with electrical circuits and current generation
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Nocturakhai
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I have read in quite a few places that you can pass a wire through a magnetic field and this will produce electricity. Does the polarity of the magnet have any effect on this or is it just the fact that it is a magnetic field? To be a little more specific, if you had a wire setup next to an electromagnet attached to AC power would the constant polarity change create electricity?
 
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You're question is worded oddly, but I'll answer what I think you are asking. An electric current is produced by a change in the magnetic flux enclosed by a loop of wire (a closed circuit). The polarity of field is not the important point, but rather whether the flux increases or decreases. Accordingly, a loop in an AC field will carry an AC current.
 

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