State what is meant by a superconducting material. Explain, therefore, why this material would be useful in improving the efficiency of power stations and hence reduce carbon dioxide emissions.
With the aid of a sketch graph, explain the term transition temperature.
Niobium has the highest transition temperature of any superconductor.
Sketch on the axes in Figure 1 the variation of resistance with temperature for Niobium that becomes superconducting at 9.2 K.
Figure 1
Explain why superconductors are useful for applications which require strong magnetic fields and name two such applications.
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