The earths magnetic dipole moment is 8.0 * 1022 Am2 . a.
Chapter 29, Problem 29.57(choose chapter or problem)
The earths magnetic dipole moment is 8.0 * 1022 Am2 . a. What is the magnetic field strength on the surface of the earth at the earths north magnetic pole? How does this compare to the value in Table 29.1? You can assume that the current loop is deep inside the earth. b. Astronauts discover an earth-size planet without a magnetic field. To create a magnetic field at the north pole with the same strength as earths, they propose running a current through a wire around the equator. What size current would be needed?
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