Reactive Power (Q) is given by V × I × sin(phi) and is measured in VARS. Which option represents Reactive Power?

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Prepare for the Michelin ECT Exam. Study with comprehensive flashcards and multiple choice questions, each with detailed hints and explanations. Get ready to excel in your exam!

Multiple Choice

Reactive Power (Q) is given by V × I × sin(phi) and is measured in VARS. Which option represents Reactive Power?

Explanation:
Reactive power is the part of electrical power that alternates energy storage and release in reactive elements, and it depends on the sine of the phase angle between voltage and current. Because it accounts for energy that is not doing net work each cycle, it’s expressed as Q = V × I × sin(phi) and measured in volt-ampere reactive (VAR). This is why the correct choice is the one that matches V × I × sin(phi) in VARS. The other forms describe real power (P = V × I × cos(phi) in Watts) or apparent power (S = V × I in VA), or are nonstandard combinations, so they don’t represent reactive power.

Reactive power is the part of electrical power that alternates energy storage and release in reactive elements, and it depends on the sine of the phase angle between voltage and current. Because it accounts for energy that is not doing net work each cycle, it’s expressed as Q = V × I × sin(phi) and measured in volt-ampere reactive (VAR). This is why the correct choice is the one that matches V × I × sin(phi) in VARS. The other forms describe real power (P = V × I × cos(phi) in Watts) or apparent power (S = V × I in VA), or are nonstandard combinations, so they don’t represent reactive power.

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