A. Copper
B. Aluminium
C. Steel reinforced copper
D. Steel reinforced aluminium
A. electrical contacts
B. thermocouple
C. heating element in high temperature furnace
D. grids of special purpose vacuum tubes
E. all of the above
A. decreases
B. increases
C. remains constant
D. becomes temperature independent
A. electrons only
B. positive ions only
C. negative ions only
D. positive and negative ions
E. none of the above
A. insulators
B. conductors
C. semiconductors
D. superconductors
A. decreasing its temperature
B. increasing its temperature
C. decreasing its vibration
D. increasing its vibration
A. Aluminium is a noble metal
B. Atmospheric oxygen can only diffuse very slowly through the oxide layer which is formed on the surface of aluminium
C. No reaction with oxygen occurs ft Any of the above