Em Energy Flow
Rate of electromagnetic energy flow per unit area given by:
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About This Question
- Subject
- physics
- Chapter
- electromagnetic waves
- Topic
- em energy flow
- Difficulty
- Hard
- Year
- 2025
Solution
Correct Answer:
Poynting vector
The Poynting Vector (S) represents the directional energy flux (power per unit area) of an EM wave. S=μ01(E×B)
- The cross product direction indicates the direction of wave propagation.
- The magnitude ∣S∣ gives the intensity of the wave in Watts per square meter (W/m2).
This hard difficulty physics question is from the chapter electromagnetic waves, covering the topic of em energy flow. It appeared in the 2025 exam.
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