The earth's field , it is claimed , roughly to approximate the field due to dipole of magnetic moment 8 X 10^22 J/T located at its centre . check the order of magnitude of this number in some way.?

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The earth's field , it is claimed , roughly to approximate the field due to dipole of magnetic moment 8 X 10^22 J/T located at its centre . check the order of magnitude of this number in some way.?

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The earth's field , it is claimed , roughly to approximate the field d...

Magnetic moment, M= 8 x10^22 J T-1

Radius of earth, r= 6.4 x10^6 m

Magnetic field strength,

Where,

mu0 = Permeability of free space = 4π x 10^-7TmA^-1

This quantity is of the order of magnitude of the observed field on earth.

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The earth's field , it is claimed , roughly to approximate the field due to dipole of magnetic moment 8 X 10^22 J/T located at its centre . check the order of magnitude of this number in some way.?

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