How does a DC current polarize

  • Thread starter jsmith613
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Main Question or Discussion Point

from my understanding polarization is a way of causing objects to be diametrically opposed (North and South poles for example)

What I don't understand is how a DC current polarizes a metal. Obviously for something to be magnetic it MUST be polarized but why does a DC current have to be used, why cant it be an AC current???

Thanks
 

Answers and Replies

  • #2
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An AC current when coiled around a magnetic capable material continually switches poles with each repeating cycle. This disrupts the magnetizing process. A DC current keeps the same polarity so that the material can align its atoms and so take on the magnetic property.
 

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