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, 2017
Time 3 Hours. Full Marks 80
Answer any Five Questions.
All questions carry equal marks.
1. Calculate vector potential of a current loop.
2. Show that Alembertian operator is invariant under Lorentz transformation.
3. Explain advanced and retarded potential obtain an expression for angular distribution of
power for uniformly moving point charge.
4. Give notes on synchrotron radiation Cerenkov radiation.
5. Discuss the motion of a charged particle in oscillating electromagnetic fields.
6. What is plasma Give the key difference between plasma and normal gas. Derive an
expression for Debye length.
7. Derive the zeroth, first and second moments of Boltzmann's equation.
8. Derive expression for plasma frequency. Explain the significance of lower and upper hybrid
frequencies.
9. While discussing the behaviour of plasma particles in static magnetic field, deduce and discuss
Larmor frequency.
10. Explain the following terms Match number, Reynold's number, Stuart number and
Hartmann number.