A. copper and aluminium
B. tin and lead
C. nickel, copper and zinc
D. silver, copper and lead
Related Mcqs:
- __________ is a hard solder?
A. Tin-lead
B. Tin-silver-lead
C. Copper-zinc
D. None of the above - By increasing impurity content in the metal alloy the residual resistivity always_____________?
A. decreases
B. increases
C. remains constant
D. becomes temperature independent - The conduction of electricity, in semiconductors, takes place due to movement of______________?
A. positive ions only
B. negative ions only
C. positive and negative ions
D. electrons and holes - The co-ordination number of a simple cubic structure is______________?
A. 2
B. 4
C. 6
D. 8 - Superconductors are becoming popular for use in________________?
A. generating very strong magnetic field
B. manufacture of bubble memories
C. generating electrostatic field
D. generating regions free from magnetic field - _____________is viscoelastic?
A. Cast-iron
B. Graphite
C. Rubber
D. Glass - Most of the common metals have _________ structure?
A. linear
B. hexagonal
C. orthorhombic
D. cubic - Carbon rods are used in wet and dry cells because_____________?
A. carbon rod serves as conductor
B. carbon can resist the attack of battery acid
C. both (A) and (B)
D. either (A) or (B) - Copper, even though costly, finds use in the windings of electrical machines because_____________?
A. copper points offer low contact resistance
B. copper can be easily soldered and welded
E. copper windings are less bulky and the machines become compact
D. all of the above - For a particular material the Hall coefficient was found to be zero. The material is______________?
A. insulator
B. metal
C. intrinsic semiconductor
D. none of the above
