Magnetizing a Hollow Ball
Name: Chuck L.
Could a hollow ball be magnetized so one pole is on the
inside surface of the ball and the other pole is on the outer surface?
No, because the field required to magnetize the ball cannot exist. However,
such a magnetized ball can be constructed from pieces separately magnetized.
Somewhere there must be flux leakage, because field lines cannot simply end
in the middle of the ball.
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Update: June 2012