Q. 113.7( 3 Votes )

The magnetic moment of the assumed dipole at the earth’s centre is 8.0 × 1022 Am2. Calculate the magnetic field B at the geomagnetic poles of the earth. Radius of the earth is 6400 km.

Answer :


R =6400KM


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The force on a north pole, is parallel to the field . Does it contradict our earlier knowledge that a magnetic field can expert forces only perpendicular to itself.

HC Verma - Concepts of Physics Part 2