EE 2202 — ELECTROMAGNETIC THEORY

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					                         B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011.
                                                    Third Semester
                                       Electrical and Electronics Engineering
                                       EE 2202 — ELECTROMAGNETIC THEORY
                                                  (Regulation 2008)
                                     Time : Three hours Maximum : 100 marks
                                                Answer ALL questions.
                                            PART A — (10 × 2 = 20 marks)
  1. Define Divergence.
  2. State Divergence theorem.
  3. What is meant by equipotential surface?
  4. Electric field is conservative field. Justify.




                                                                                        m
  5. What is the point form of Ampere’s Circuital Law?
  6. Distinguish scalar and Vector Magnetic Potential.
  7. Give Lorentz force equation.




                                                                            o
  8. Compare circuit and field theory
  9. What are the standing waves?




                                                                        t.c
  10. Give the applications of wave guides.


                                         PART B — (5 × 16 = 80 marks)




                                                            o
                                                         sp
                                      l      og
                                   .b
              n           er
           or
   -c
  gg




  Or
  (b) Explain in detail line, surface and volume integrals of vector functions.
  12. (a) Apply Gauss’s law to an
  (i) infinite line charge
en




  (ii) infinite sheet of charge.
  Or
  (b) (i) Derive Potential distribution in a coaxial conductor.
  (ii) The interface between a dielectric medium having relative permittivity 4 and free space is marked the
  y = 0 plane. If the electric field next to the interface in the free space region is




  given by determine E field on the other side of the interface.
  13. (a) Derive the boundary conditions to explain the behavior of magnetic
  field at the interface of two magnetic media.
  Or
  (b) Derive an expression for energy density in a magnetic field.
  14. (a) Derive the Maxwell's equations is Integral and point forms.
  Or
  (b) (i) In a charge free non magnetic dielectric region, the magnetic field is given by
  Calculate the dielectric constant of the medium and also the




                                                                                          m
  displacement current density.
  (ii) A conducting circular loop of radius ‘a has its centre at the
  origin and its axis makes an angle θ with the z axis. The loop is




                                                                              o
  placed in a magnetic field
  Z a ft B B ˆ . 2 cos




                                                                          t.c
  0π=
  r
  Wb/m2
  (1) Derive the expression for the induced voltage on the loop.




                                                            o
  (2) If the peak to peak voltage is l6 mV at a frequency of 1 KHz when the loop lies in the xy plane,
  determine the loop radius given that = 0 B 10 mwb/m2




                                                         sp
  15. (a) Explain in detail the behavior of plane waves in lossless medium.
  Or
  (b) Explain Poynting Vector and Power Flow in Electromagnetic Fields.
                                      l       og
                                   .b
              n           er
           or
   -c
  gg
en

				
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