N A L A N D A O P E N U N I V E R S I T Y
M.Sc. Physics, Part-I
PAPER-III
(Electrodynamics and Plasma Physics)
Annual Examination, 2016
Time 3 Hours. Full Marks 80
Answer Five Questions in all, selecting at least Two Questions from each group.
All questions carry equal marks.
GROUP
1. Find transformation equations for E
and B
under Lorentz transformations and show that
E B

is invariant.
2. Explain Lienard-Weichert potential. Obtain an expression for Lienard-Weichert potential of a
uniformly moving charge.
3. Discuss the motion of a charged particle in an oscillating electromagnetic field.
4. Discuss the motion of a charged particle in a non-uniform electric field.
5. Deduce Larmor's formula for a non-relativistic accelerated charge.
GROUP
6. Give Saha's theory of thermal ionisation and explain the determination of plasma ionisation on
its basis.
7. Write Maxwell's equations in tensor form and show that they are covariant under Lorentz
transformations.
8. What are magneto Sonic waves Deduce the expression for velocity of magnet Sonic waves
in plasma. How are these waves different form the Alfven moves
9. Derive Boltzmann's equation. What is Boltzmann-Vlasov equation
10. Derive an expression for plasma frequency from the mass conservation equation of continuity.