Using Maxwell equations derive the following energy conservation law for electromagnetic fields, known as Poynting's theorem,

for a linear isotropic medium, for which D = ∈E and B = μH. Give the physical interpretation for each term in this equation. What are the physical dimensions of these terms?

Maxwell's Equations.

Transcribed Image Text:

Ə • √ ₁₂ (²½ €E ² + ¼ µH ²) d ²³r + f/₂ (Ex H). dS: = Ət -Loc. (J. E)d³r