Question

Choose the correct option for Poynting vector.

• A. It is the flow of energy per unit time per unit density.
• B. It is the flow of energy per unit time per unit area.
• C. The direction of Poynting vector is along the propagation of EM wave.
• D. Both b and c

Answer 1

The correct option is D Both b and c

Poynting vector describes the relationship between an electric and magnetic field and the resultant vector direction. It is the flow of energy per unit time per unit area. It also describes the magnitude and direction of flow of energy for the given EM wave per unnit volume.