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51. Obtain the earth's magnetisation, assuming that the earth's field can be approximated by a giant bar magnetof magnetic moment 8.0x1022 Am2. Radius of earth =6400km.1) 62.8 Am-12) 52.8 Am-13) 72.8 Am-4) 82.8 Am |
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Answer» Option (3) is correct.Explanation:The magnetization is that quantity which TELLS about the magnetic dipole moment of a magnetic material.It is DEFINED as the magnetic dipole moment of the material per unit VOLUME..where, = magnetic dipole moment of the material. = volume of the material.Given:Magnetic moment of the Earth, .RADIUS of earth, .The volume of the Earth, .The Earth's magnetization is given by.Thus, option (3) is correct. |
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