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1011601 MagnetismELECTRIC AND MAGNETIC PHENOMENA INTERACT. A MAGNETIC FIELD ARISES WHEN ELECTRIC CHARGE carriers move relative to an observer. Conversely, when an electrical conductor moves in a magnetic field, an electric current flows in that conductor.
Geomagnetism The earth has a core consisting largely of iron, heated to the extent that some of it liquefies. As the earth rotates on its axis, the iron in the core flows in convection patterns, generating the geomagnetic field that surrounds our planet and extends thousands of kilometers into space.
Stan Gibilisco: Teach Yourself Electricity and Electronics, 5th Edition. Magnetism, Chapter (McGraw-Hill Professional, 2011), AccessEngineering Export