Electrical Engineering Materials

A. smoky and dirty atmosphere
B. humidity in the atmosphere
C. both (A) and (b)
D. neither (A) nor (b)

A. electrons only
B. positive ions only
C. negative ions only
D. positive and negative ions
E. none of the above

A. decrease dielectric constant
B. decrease dielectric strength
C. decrease insulation resistance
D. increase dielectric loss
E. all of the above

A. large
B. small
C. nil
D. any of the above

A. non-linear conductor
B. reverse conductor
C. bad-conductor
D. non-conductor

A. Aluminium is more ductile and malleable than copper
B. Aluminium is available in plenty, cheaper and lighter than copper
C. Aluminium has lower resistivity than that of copper
D. Aluminium has less temperature co-efficient than copper

A. extrnisic
B. intmisic
C. N-type
D. P-type

A. intensity
B. speed
C. frequency
D. wave length

A. Porcelain
B. Slate
C. Asbestos
D. Glass

A. Diamond
B. High speed steel
C. Mild steel
D. Cast iron