Search
.Management Sciences
Category: Electrical Engineering Materials
A perfect conductor has_____________?
A. zero conductivity
B. unity conductivity
C. infinite conductivity
D. none of the above
Effect of moisture on the insulating materials is to________________?
A. decrease dielectric constant
B. decrease dielectric strength
C. decrease insulation resistance
D. increase dielectric loss
E. all of the above
___________ is most commonly used for making magnetic recording tape?
A. Silver nitrate
B. Ferric oxide
C. Small particles of iron
D. Silicon-iron
Which of the following is an advantage of stranded conductor over equivalent single conductor ?
A. Less liability to kink
B. Greater flexibility
C. Less liability to break
D. All of the above
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
The structure sensitive property of a super conductor is______________?
A. critical magnetic field
B. transition temperature
C. critical current density
D. none of the above
___________ has the best damping properties?
A. Diamond
B. High speed steel
C. Mild steel
D. Cast iron
If the resistance of a conductor does not vary in accordance with Ohm’s law it is known as____________?
A. non-linear conductor
B. reverse conductor
C. bad-conductor
D. non-conductor
Recent Comments