(a)How you conclude that the all superconductors are diamagnetic but all diamagnetic materials are not superconductors. (b)Determine the transition temperature and critical field at 4.2 K for a given specimen of a superconductor if the critical fields are 1.41 x 105 and 4.205 x 105 amp/m at 14.1 K and 12.9 K, respectively.
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