## March 15, 2010

### 2007 Calicut University Electrical and Electronics Engineering FIFTH SEMESTER B.TECH. (ENGINEERING) DEGREE EXAMINATION, Question paper

2007 Calicut University Electrical and Electronics Engineering FIFTH SEMESTER B.TECH. (ENGINEERING) DEGREE EXAMINATION, Question paper
FIFTH SEMESTER B.TECH. (ENGINEERING) DEGREE EXAMINATION, DECEMBER 2007
Electrical and Electronics Engineering
EE 2K 503/PTEE 2K 3Q4—ELECTROMAGNETIC FIELD (THEORY) Time : Three Hours

Maximum : 100 Marks

1.Part A: (8*5=40 marks)
(a) Derive an expression for energy stored in a magnetic field.
(b} Derive the capacitance of an Isolated sphere. Explain the steps.
(c) What is a magnetic dipole ? Explain with a sketch.
(d)_ Explain the types of transmission lines and their applications.-
(e) What are plane waves, uniform plane waves and plane wave front ? Explain.
(f) Differentiate Elliptical from circular polarization. Explain their significance.
(g) Derive standard wave equations from Maxwell's equations.
(h) explain the concept of brewster angle.obtain an expression for it

Part B:(4*15=60 marks)
(ii)(a) (i) Derive the potential frictions for sinusoidal oscillations. (8 marks)
(ii) State and derive stokes theorem and divergence theorem. (7 marks)

Or

(M (ii Define Dipole. Obtain an expression for the resultant potential and electric field. (8 marks)
iiExpla in spherical to Cartesian co-ordinates transformation. Obtain the relation. (7 marks)

III. (a) (ty Derive an expression for Inductance of solenoid. (8 marks)
(iiV Derive expressions for conduction current and displacement current densities. r> (7 marks)

Or

(b) (i) Derive an expression for Inductance of toroid. • (8 marks)
(ii) Differentiate Self Inductance from Mutual Inductance. (7 marks)

IV. (a) State and derive poynting theorem. Also derive poynting vector for time varying fields.
Explain its applications.

or

(b) (i) Derive an equation that would describe an ellipse for elliptical polarization,
(ii) Obtain Maxwell's equations in differential form.

V. (a) (i) Derive the equations of smith chart.
(ii) Explain the potential apphcations of Smith chart.

Or

(b) (i) Compare the characteristics of co-axial line with 2 wire transmission line,
(ii) Define and explain the significances of:
1 Phase velocity.
2 Group velocity.
3 Characteristic Impedance.

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