The current drawn by the line due to corona losses is___________?

The material commonly used for insulation in high voltage cables is_______________?

A. lead
B. paper
C. rubber
D. none of the above

If variable part of annual cost on account of interest and depreciation on the capital outlay is equal to the annual cost of electrical energy wasted in the conductors, the total annual cost will be minimum and the corresponding size of conductor will be most economical. This statement is known as___________________?

A. Kelvin’s law
B. Ohm’s law
C. Kirchhoffs law
D. Faraday’s law
E. none of the above

Constant voltage transmission entails the following disadvantage?

A. large conductor area is required for same power transmission
B. short-circuit current of the system is increased
C. either of the above
D. none of the above

The operating voltage of extra high tension cables is upto_______________?

A. 6.6 kV
B. 11 kV
C. 33 kV
D. 66 kV
E. 132 kV

There is a greater possibility of occurence of corona during______________?

A. dry weather
B. winter
C. summer heat
D. humid weather
E. none of the above

The material generally used for armour of high voltage cables is_____________?

A. aluminium
B. steel
C. brass
D. copper