State two: (i) effects of corona; (ii) factors affecting corona.

a)

(i) Effects of corona:

• Power loss: Corona discharge leads to a loss of power in the transmission line, which reduces the efficiency of power transmission.
• Audible noise: The ionization of air around the conductors produces a hissing sound, which can be a nuisance, especially in residential areas.
• Radio interference: Corona discharge generates electromagnetic noise that can interfere with radio and television reception.
• Ozone production: The chemical reactions during corona discharge produce ozone, which can corrode the conductor material over time.

(ii) Factors affecting corona:

• Atmospheric conditions: Temperature, pressure, and humidity significantly affect the air density and dielectric strength, thus influencing corona.
• Conductor size and spacing: Larger conductor diameter