Curie point is the temperature at which
A. matter becomes radioactive
B. a metal loses magnetic properties
C. a metal loses conductivity
D. transmutation of metal occurs
Answer: Option B
A. matter becomes radioactive
B. a metal loses magnetic properties
C. a metal loses conductivity
D. transmutation of metal occurs
Answer: Option B
What will be the total resistance of the three 20-Ω coils connected in series?
A. 40 Ω
B. 20 Ω
C. 60 Ω
D. 800 Ω
Superconductors are substances which
A. conduct electricity at lower temperature
B. offer high resistance to the flow of current
C. offer not resistance to the flow of current
D. conduct electricity at high temperature
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