It is the purpose of this article to give the obtainable to undergraduate student’s grasp evidence for the fact that the magnetic field outside the hollow superconducting sphere (superconducting shell) coincides with the field of a point magnetic dipole both when an uniform external magnetic field is applied as when a ferromagnetic sphere is located at the shell’s geometrical center. The evidence is founded on the London’s equation transformation to an integral equation for the vector potential of system. This evidence is alternative to the traditional one, when the London’s equation solution inside a superconductor and the Maxwell’s equation solution outside it are joined on it’s surface. The integral equation may be solved completely for the case of a solid sphere
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