Re: More confirmation--interesting electrics article
Posted by JAC on 6/17/2009, 7:18 am
Actually, I am not buying it.

You have to remember that the earth is spinning on its axis with a period of 24 hours.

The angular velocity on the surface of the earth from that is much higher than any ocean currents.

Also, molten metal would have to be a lot more conductive than salt water.

So, molten metal spinning at a high angular velocity would generate a very large current and hence a big B-field in a consistant direction.

I agree ocean currents have an associated electrical current (J), but globally they run in various directions.

So, the net effect globally is that the B-fields from various legs of the currents would tend to cancel each other out.

Intuitively, I think the spinning molten core makes a lot of sense.

Doesn't Mars have a magnetic field as well?

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More confirmation--interesting electrics article - Mike_Doran, 6/17/2009, 1:17 am
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