EE6302 Electromagnetic Theory, Second year, Department of Electrical and Electronics Engineering, Model Exam Questions

EE6302 Electromagnetic Theory, Second year, Department of Electrical and Electronics Engineering, Model Exam Questions

Answer ALL Questions

PART A – (10 x 2 = 20 Marks)

1.      State stoke’s theorem

2.      State gauss’s law

3.      Distinguish between potential & potential difference

4.      Define dielectric strength. Give its units. State its value for the air

5.      State Biot-savart’s law

6.      What is Lorentz force equation? Write its application

7.      State Faraday’s law of electromagnetic induction

8.      What is the significance of displacement current

9.      Define intrinsic impedance of a medium

10.  Define skin depth

Part- B

11.  a) Derive an expressions for electric field intensity E due to an uniformly charged infinitely long

straight line with constant charge density in c/m                                                              (13)

Or

(b)(i) By means of gauss’s law, determine the electric field intensity at a point ‘P’ at distant ‘h’

m from an infinite line of uniform charge _l c/m                                                        (8)

(ii) State and explain the divergence theorem                                                                        (5)

12.  (a) (i) Derive the expression for energy density in electrostatic field                                      (3)

(ii) Boundary condition (two dielectric media)                                                                      (10)

Or

(b)(i) State and explain uniqueness theorem                                                                           (5)

(ii) Derivelaplace&poission’s equation from the fundamental postulates of electrostatics (8)

13.  (a) Deduce the expression for magnetic field intensity due to co-axial cable carrying

current‘l’                                                                                                                         (13)

Or

(b) (i) Find an expression for torque acting on a square loop carrying a current ‘I’               (6)

(ii) Derive an expression for a force between two long straight parallel current carrying

current                                                                                                                               (7)

14.a) Derive & explain the Maxwell’s 1^st& 2^nd equation in integral & point form                       (13)

Or

b) (i) Explain the relationship between the field theory & circuit theory using a simple RLC

series circuit                                                                                                                (8)

(ii) Writemaxwell’s equation for good conductor                                                                  (5)

15. a) Show that the total power flow along a co-axial cable will be given by the surface

integration of the poynting vector over any closed surface                                        (13)

Or

(b) Define Brewster angle & derive its expression                                                           (13)

Part C

(1x15=15 Marks)

16. Case study of Electrostatic Discharge (ESD)                                                      (15)