Disruptive corona begins in smooth cylindrical conductors in air at NTP if the electric field intensity at the conductor surface goes up to

The good effect of corona on overhead lines is to

Which of the following is correct
1. Bundle conductor reduces the corona loss
2. Bundle conductor increases the inductance and reduces the capacitance
3. Corona loss causes radio interference and reduces the capacitance

Corona is

Which of the following statements is true regarding corona?

Which of the following statements regarding corona are true
1. It causes radio interference
2.  It attenuates lighting surges
3. It amplifies switching surges
4. It causes power loss
5.  It is more prevalent in the middle of conductor for transmission line employing flat conductor configuration
Select the correct  answer using codes given below

Corona is accompanied by

Ozone effect can be detected by

The current drawn by the line owing to corona loss is

In context of corona with smooth and polished conductors