Question: # 4 . ( a ) What is the magnetic energy density of the Earth s magnetic field of 5 0 T ? ( b

#4.(a) What is the magnetic energy density of the Earths magnetic field of 50 T?
(b) How much magnetic energy would be stored in a spherical shell bounded below by the Earths surface and extending to 16 km altitude? Assume a spherical Earth and constant energy density within the shell.

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