Pointing vector $P=E \times H$ has the unit
- A. Watts/metre$^2$
- B. Watts/metre
- C. Watts-metre
- D. Watts-metre$^2$
Answer: A. Watts/metre$^2$
Explanation: The Poynting vector represents the directional energy flux (the energy transfer per unit area per unit time) of an electromagnetic field, measured in Watts per square meter.