Poynting Vector MCQs

Practice Poynting Vector MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1

Electromagnetic TheoryPoynting Vector

The Poynting vector represents electromagnetic?

Show AnswerHide Answer Report an error

Correct Answer: A. Power-flow density

Explanation: The Poynting vector S=E×H gives electromagnetic power flow per unit area.

Reference: Standard electromagnetic theory: poynting vector

Question 2

Electromagnetic TheoryPoynting Vector

Show AnswerHide Answer Report an error

Correct Answer: A. W/m²

Explanation: Because the Poynting vector is power per unit area, its SI unit is watt per square metre.

Reference: Standard electromagnetic theory: poynting vector

Question 3

Electromagnetic TheoryPoynting Vector

Show AnswerHide Answer Report an error

Correct Answer: A. 25 W/m²

Explanation: For perpendicular fields, |S|=|E||H|=100×0.25=25 W/m².

Reference: Standard electromagnetic theory: poynting vector