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Dynamo effect of earths core

  1. Sep 5, 2011 #1

    Does anyone know if anyone else has made a mock demonstration of the dynamo effect of the earth's core?

    I've heard that the core is supposed to be made of a liquid metal sphere with a solid metal core. When they spin, they make the earth's magnetic field.

    The question is, if the above is true, wouldn't the act of generating the field slowdown the core rotational speed due to loading/Bemf?

    How does the act of spinning the core generate the field? does it rely on the sun's magnetic field?

    Could this be demonstrated by using a sphere mercury or something?

  2. jcsd
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