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Use moon as generator w earths magnet field

  1. Nov 13, 2014 #1
    A moving magnetic field will produce current in a wire. The earth's magnet field goes beyond the moon. Does that mean bases on the moon could somehow get free energy from a coil setup as it's effectively perpetually moving through earths magnetic field?
  2. jcsd
  3. Nov 13, 2014 #2


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    It wouldn't be free energy, but you could use the moon's motion to power something (i.e. you would be stealing energy from the moon's orbit)...how much power would be produced I am not sure at all, the Earth's magnetic field, especially at the distance where the moon is, is not all that strong. Even at the surface of the Earth, the field strength is ~ .5guass.
  4. Nov 14, 2014 #3

    Vanadium 50

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    You might want to estimate how much power you would get and compare that with the cost of a moon shot.
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