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The earth's magnetic field at the equato...

The earth's magnetic field at the equator is approximately `0*4G`, Estimate the earth's dipole moment.

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`1.05 xx 10^23 Am^2`
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A magnetic needle free to rotate in a vertical plane parallel to the magnetic meridian has its north tip down at 60^(@) with the horizontal.The horizontal component of the earth's magnetic field at the place is known to be 0.4G .Determine the magnitude of the earth's magnetic field at the place.

MODERN PUBLICATION-MAGNETISM AND MATTER-PRACTICE PROBLEM
  1. A bar magnet of length 10cm is placed in the magnetic meridian with it...

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  2. A short bar magnet of magnetic moment 0*9JT^-1 is placed with its axis...

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  3. A short bar magnet placed with its axis at 30^(@) with an external fie...

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  4. A magnetic needle has magnetic moment of 6*7xx10^-2Am^2 and moment of ...

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  5. Two magnets of magnetic moments M and sqrt3M are joined to form a cros...

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  6. The earth's magnetic field at the equator is approximately 0*4G, Estim...

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  7. A bar magnet is suspended in a region of earth's magnetic field such t...

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  8. Two bar magnets of magnetic moment M and (3M)/(5) are kept in a regi...

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  9. For a place, the true value of angle of dip is 30^@ . Find the appare...

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  10. A freely suspended bar magnet makes an angle of 60^@ with the horizon...

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  11. In the magnetic meridian of a certain place, the horizontal component ...

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  12. For a place, horizontal component of the earth's magnetic magnetic fie...

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  13. A compass needle whose magnetic moment is 60Am^2 points geographic nor...

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  14. A short bar magnet is placed with its north pole pointing north. The n...

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  15. A 10 cm long bar magnet of magnetic moment 1.34 Am2 is placed in the m...

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  16. A short bar magnet is placed with its north pole pointing north. The n...

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  17. The magnetic moment of an electron of charge e moving in a circular ...

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  18. A magnetic field of 1600Am^-1 produces a magnetic flux of 2*4xx10^-5 w...

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  19. Find the amount of current required to demagnetise a permanent magnet ...

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  20. A domain in ferromagnetic iron is in the form of a cube of side length...

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