Computer Programming MCQs

5739 MCQs  (Page 253 of 574)

Selenium is __________ semiconductor?
A. Extrnisic
B. Intmisic
C. N-type
D. P-type
Due to which of the following fact, in India, aluminium is replacing copper ?
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
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
In conductors conduction of electricity takes place due to movement of_______________?
A. Electrons only
B. Positive ions only
C. Negative ions only
D. Positive and negative ions
Surface resistance of an insulating material is reduced due to the______________?
A. Smoky and dirty atmosphere
B. Humidity in the atmosphere
C. Both (a) and (b)
D. Neither (a) nor (b)