The fact that the conductance of some metals rises to infinity at some temperature below a few Kelvin is called
A
Thermal conductivity
B
Optical conductivity
C
Magnetic conductivity
D
Superconductivity
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D
Superconductivity
d The fact the conductor of some metals rises to infinity at some temperature below a few Kelvin is called Superconductivity
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$(A)$ decreases linearly with time
$(B)$ reaches a maximum and then decreases
$(C)$ fall to zero after time $t = a/2b$
$(D)$ changes at a rate $-2b$
Options :