Previous Year Question
Which of the following power transmission lines has the least charging current and skin effect?
Correct answer: B
Explanation
In steady-state DC, line capacitance does not draw continuous charging current and current distribution is not subject to the AC skin effect. Therefore HVDC has essentially no charging current and no skin effect in normal steady operation.
Step-by-step solution
Correct Answer
B — HVDC Transmission Line
Explanation
In steady-state DC, line capacitance does not draw continuous charging current and current distribution is not subject to the AC skin effect. Therefore HVDC has essentially no charging current and no skin effect in normal steady operation.
Key Concept
Charging Current and Skin Effect
Exam Point
DC line → no steady charging current, no skin effect.
Exam tip
DC line → no steady charging current, no skin effect.
Quick method
DC line → no steady charging current, no skin effect.