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Instantaneous power is negative, when the polarities of voltage and current are of __________

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Instantaneous power is negative, when the polarities of voltage and current are of __________ (a) opposite sign (b) same sign (c) voltage is zero (d) current is zero I have been asked this question by my college professor while I was bunking the class. My question is taken from Instantaneous Power topic in division Power and Power Factor of Network Theory Select the correct answer from above options network theory questions and answers, network theory questions pdf, network theory question bank, network theory gate questions and answers pdf, mcq on network theory pdf, gate network theory questions and solutions, network theory mcq Test , ies network theory questions, Network theory Questions for GATE EC Exam, Network Theory MCQ (Multiple Choice Questions)

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Correct choice is (a) opposite sign To explain: Instantaneous power is negative, when voltage and current have opposite sign that is if voltage is positive, the current is negative and if current is positive, the voltage is negative.

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