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What is probable cause of earth's magnet...

What is probable cause of earth's magnetism?

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1. Earth has molten charged fluid. When the earth rotates then this charged fluid also rotates with the earth and sets up the current loops which may be the reason of earth.s magnetism.
2. Every substance is made up of protons and electrons. When earth rotates, circulating currents set up which may be the reason of earth.s magnetism.
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