The superconductivity is due to____________?

A. the crystal structure having no atomic vibration at 0°K
B. all electrons interact in the super-conducting state
C. the electrons jump into nucleus at 0°K
D. none of the above

highest conductivity_____________?

B. lowest temperature co-efficient
C. good mechanical strength
D. good corrosion resistance
E. easy solderable and drawable quality
F. all of the above

An H.R.C. fuse is_______________?

A. a ceramic body having metal and caps
B. a wire of platinum
C. a heavy cross-section of copper or aluminium
D. a ceramic tube having carbon rod inside it

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