a) Define Poynting vector. Derive an expression for it and explain it…

Question

a) Define Poynting vector. Derive an expression for it and explain its physical significance for electromagnetic wave in free space. Prove the relation $\vec{E} = c\vec{B}$. (12)

b) Evaluate $\nabla.(r^3.\vec{r})$ where $\vec{r} = x\hat{i} + y\hat{j} + z\hat{k}$. (8)

Related pages

• Poynting Vector — topic
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