The skin effect of a conductor will reduce as the__________?
A. resistivity of conductor material increases
B. permeability of conductor material increases
C. diameter increases
D. frequency increases
The presence of ozone due to corona is harmful because it________________?
A. reduces power factor
B. corrodes the material
C. gives odour
D. transfer energy to the ground
E. none of the above
The power factor of industrial loads is generally______________?
A. unity
B. lagging
C. leading
D. zero
A 3-phase 4 wire system is commonly used on________________?
A. primary transmission
B. secondary transmission
C. primary distribution
D. secondary distribution
When the interconnector between two stations has large reactance?
A. the transfer of power will take place with voltage fluctuation and noise
B. the transfer of power will take place with least loss
C. the stations will fall out of step be¬cause of large angular displacement between the stations
D. none of the above
310 km line is considered as_______________?
A. a long line
B. a medium line
C. a short line
D. any of the above
Electro-mechanical voltage regulators are generally used in___________?
A. reactors
B. generators
C. transformers
D. all of the above