5) Corona loss can be reduced by the use of hollow conductors because :

the current density is reduced

the eddy current in the conductor is eliminated

for a given cross section, the radius of the conductor is increased

of better ventilation in the conductor

Answer is:

for a given cross section, the radius of the conductor is increased

diameter of the conductor

material of the conductor

height of the conductor

none of above

Answer is:

there will be no corona glow

corona glow will be uniform along the length of the conductor

there will be minimum power loss

hissing sound will be more intense

Answer is:

corona is voltage effect

corona takes place on short transmission lines

corona is accompanied with power loss

corona attenuates lightning surges

Answer is:

they have high potential difference

they are closely spaced

they carry D.C. power

they have high potential difference and they are closely spaced

Answer is: