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Answer & Explanation
Correct AnswerD. Two or more conductors, all having same polarity and always operates with ground or metallic return.
Quick Explanation
A homopolar HVDC link uses two or more conductors of the same polarity, usually negative with respect to earth, operating in parallel with ground return. This lowers conductor insulation stress to ground and provides some operational flexibility. The configuration described in option D is correct.
Formula / Key Relation
Homopolar link: parallel conductors with same polarity, commonly negative
Detailed Explanation
Correct Answer
D — Two or more conductors, all having same polarity and always operates with ground or metallic return.
Concept and Reasoning
A homopolar HVDC link uses two or more conductors of the same polarity, usually negative with respect to earth, operating in parallel with ground return. This lowers conductor insulation stress to ground and provides some operational flexibility. The configuration described in option D is correct.
Calculation / Key Relation
Homopolar link: parallel conductors with same polarity, commonly negative
Exam Takeaway
Homopolar = same polarity conductors.
Common Mistake
Do not confuse homopolar with a bipolar link, which uses opposite polarities.
Quick Trick
Homopolar = same polarity conductors.
Common Mistake
Do not confuse homopolar with a bipolar link, which uses opposite polarities.
Exam Tip
Homopolar = same polarity conductors.
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