Electrical Engineering Materials

A. Phosphorous
B. Rubber
C. Silicon
D. Aluminium

A. Both have great tendency for oxidation
B. Both have low melting point
C. Very large length of wires will be required
D. All of the above

A. Tungsten
B. Aluminium
C. Copper
D. Carbon

A. temperature
B. resistance
C. eddy currents
D. coupling co-efficient

A. positive ions only
B. negative ions only
C. positive and negative ions
D. electrons and holes

A. Solubility
B. Viscosity
C. Porosity
D. Hygroscopicity

A. insulators
B. conductors
C. semiconductors
D. superconductors

A. Less liability to kink
B. Greater flexibility
C. Less liability to break
D. All of the above

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

A. Copper
B. Nichrome
C. Platinum
D. Manganin