A) smaller when switched on
B) greater when switched off
C) the same whether it is switch off or switch on
D) greater when switched on
Correct Answer: D
Solution :
Super conductor is a perfect diamagnetic because diamagnetic substances are always temperature independent. In super conductor abnormal relation in seen between resistance of temperature. Here R decreases with decrease in temperature-but at certain minimum temperature. R drops to zero on further decreases in temperature R is unchanged.
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