M.Sc. DEGREE EXAMINATION, APRIL 2017
Second Semester
ELECTROMAGNETIC THEORY
(Common For Physics in Biosensors)/
M.Sc. (Physics))
(CBCS 2016 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 x 2 20)
Answer all questions.
1. Write down the wave equation for E and H in free space.
2. What is meant by free space?
3. What is Reflection coefficient?
4. Write down the magnetic field boundary conditions.
5. What is Normal dispersion?
6. What is meant by scattering of EM waves?
7. Write down the types of wave guides.
8. Define point Charge.
9. "Plasma as the fourth state of matte?' Comments on it.
10. Write down the applications of Magnetohydrodynamics.
Sub. Code
522203/
521203
RW-175
2
ws 4
Part B x 5 25)
Answer all questions choosing either or
11. State explain the conservation of energy and
momentum.
Or
Derive and expression for propagation of EM waves
in Isotropic medium.
12. Derive the boundary conditions at the surface of
discontinuity.
Or
Briefly explain the condition for total internal
reflection.
13. Derive Lorentz formula.
Or
Explain the polarization of scattered light.
14. Explain Rectangular and circular wave guides.
Or
Write a short note on radiation of moving charges.
15. Derive an expression for Charged particles in
uniform constant Electric field.
Or
Write note on Magnetohydrodynamics (MHD).
RW-175
3
ws 4
Part C x 10 30)
Answer any three questions.
16. Derive EM wave equations in terms of Scalar and Vector
potential.
17. Derive the fresnel's equations of reflection and
transmission coefficient at the interface between two
dielectric media.
18. What is dispersion? Explain the experimental
demonstration of anomalous dispersion in gases.
19. With neat sketch explain the principle, working and
application of Magnetron.
20. Write note on: Occurrence of Plasma and Magnetic
confinement.
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