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