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Electromagnet Question

  1. Jul 12, 2008 #1
    Good Morning!

    Is it true, that supplied with the same voltage and current, an electromagnet with
    10,000 turns of #40 wire will have the same lifting power as an electromagnet having
    100 turns of #20 wire? (cores are identical).

    Thank You All!
  2. jcsd
  3. Jul 13, 2008 #2


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    Science Advisor

    No, lifting power depends only on the current, and it is not simply proportional to the current.
    For a given voltage, the current is proportional to VR^2/L for a wire of radius R and length L.
  4. Jul 13, 2008 #3
    Thanks Very Much!
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