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1.Define potentials. Write Maxwell’s equations in term of potentials. Discuss Green function method of solving wave equations.

2.Derive and discuss electromagnetic field of a point charge in arbitrary motion. Derive and discuss total power radiated and its angular distribution by an an accelerated charge.

3.Define vectors and tensors in 4-dimentional Minkoweskiin space-time. Define 4-current density, electromagnetic field tensor and its dual and derive Maxwell’s eq 1 uations in 4-dimensional covariant form.

4. Write down Maxwell’s equations. Show that the equation of continuity follows from Maxwell’s equations. Derive and discuss Poynting theorem and conservation law of energy and momentum for a system of charged particles and electromagnetic field

Profile image of richa singh
14 Years agoGrade
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1 Answer

Profile image of Aman  Bansal
14 Years ago

Dear Richa,

Maxwells equations in terms of vector potential

\nabla\cdot\textbf{A} + \frac{1}{c^2} \frac{\partial \phi}{\partial t} = 0.

Using the Lorenz gauge, Maxwells equations can be written compactly in terms of the magnetic vector potential A and the electric scalar potential Φ.

\nabla^2\phi - \frac{1}{c^2}\frac{\partial^2 \phi}{\partial t^2} = - \rho/ \epsilon_0
\nabla^2\textbf{A} - \frac{1}{c^2}\frac{\partial^2 \textbf{A}}{\partial t^2} = - \mu_0 \textbf{J}

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