give justification that Earth act as a magnet
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The magnetic field is generated by electric currents due to the motion of convection currents of molten iron in the Earth's outer core driven by heat escaping from the core, a natural process called a geodynamo. Answer by Richard Muller, Professor of Physics at UC Berkeley, author of Now, The Physics of Time, on Quora:
The Earth behaves like a magnet because the Earth is a magnet. It is not a permanent magnet, but an electromagnet.
We now understand why. Deep in the Earth, molten metal (mostly iron) flows due to heat which causes convection. (The heat appears to be generated by iron condensing at the solid core.) This flow tends to organize itself into patterns, just like the patterns you’ll see in oil if you heat it in a frying pan. Such patterns in a flowing conductor tend to create magnetism. The same idea is used in the “dynamo”, a device that creates both electric current and magnetism from moving conductors. Commercial dynamos are the source of essentially all of our wall-outlet electricity.
The Earth behaves like a magnet because the Earth is a magnet. It is not a permanent magnet, but an electromagnet.
We now understand why. Deep in the Earth, molten metal (mostly iron) flows due to heat which causes convection. (The heat appears to be generated by iron condensing at the solid core.) This flow tends to organize itself into patterns, just like the patterns you’ll see in oil if you heat it in a frying pan. Such patterns in a flowing conductor tend to create magnetism. The same idea is used in the “dynamo”, a device that creates both electric current and magnetism from moving conductors. Commercial dynamos are the source of essentially all of our wall-outlet electricity.
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do ya do se adhik padartho ka misamangi mishran kehlata hai
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