though earth is acting as a huge bar magnet it is not attracting other ferromagnetic materials.Give reason.why?
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Answer:The magnetic character of ferromagnetic materials is affected by the external temperature. When they are heated they become para magnetic.
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The earth is acting as a huge bar magnet is not attracting other ferromagnetic materials because -
• The range of the earth's magnetic field is huge as compared with the ferromagnetic metal objects present on the upper surface of the earth. This huge scale difference makes the ferromagnetic metals negligible to the earth's magnetic field.
• Due to huge expansion of the earth's magnetic field the magnetic attraction in a particular point is very weak as compared with normal magnets, and this weak magnetic attraction is unable to attract any kind of ferromagnetic metals.
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