Which of the following effects are associated with transmission line

A. corona effect
B. skin effect
C. Ferranti effect
D. all of the above

Answer: D. all of the above

Explanation:
Under no load conditions or light load conditions of a transmission line, receiving end voltage is greater than sending ending voltage will occur in case of medium and transmission lines. This is called ferranti effect. This is due to capacitance effect is dominating compare to inductance of transmission line under no load only.

Accumulation of current on the surface of the conductor is called skin effect. Due to skin effect the effective area of current flowing path is reduced.

Corona is the electrical discharge of atmospheric air. If the operating voltage is more than dielectric strength of atmospheric air, air molecules are ionized and start accumulating on the conductor surfaces producing corona.

Therefore, these all effects are associated with transmission line.


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