Shivaji University 2010-5th Sem B.E T.E(Electrical)- , Electromagnetics (New ) - Question Paper
Electromagnetics regular paper-semester V, for 3rd years electrical engineering students of Shivaji University.
iii mm mill 1-153
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T.E. (Electrical) (Sem - V) (New Course) Examination, 2010 ELECTROMAGNETICS
Day and Date : Friday, 26-11 -2010 Total Marks : 100
Time : 10 00 a.m. to 1.00 p.m.
Instructions : I) Solve any three questions from Section I and Section //,
2) Assume suitable data wherever necessary.
3) Figures lo ihe right indicates full marks.
~ SECTION - I
1. a) Four identical point charges of 8jj.c are placed at four comers of square 4 m
inside. Find out the total force acting of charge Q 4. 8
b) Prove that for surface charge distribution E = - 8
2. a) State and explain Coulomb's law and also explain electric field intensity and
flux density. 8
b) Two identical uniform charges lie along the X and Yaxis with charge densities 15 |ic/m. Obtain D at point P(2, 3,4). 8
3. a) State and explain Potenti al Gradient and derive the equation of potential grad ient
in Carte s ian co -ordinate system 8
b) If V = 100 sin 0/r2 in the free space and point P is located at (2, 45% 30) then find E at point P. 8
4. a) Derive the expression of capacitance of
i) Between few plates 4
ii) Co-ax I al cable. 6
P.TO,
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b) A capacitor is 10 be constructed from two metallic plates each 2 cm2 in area separated by 2 mm. Given 1.5* 10-3 m3of a dielectric material with Er = 4, how should the dielectric be used to maximize the capacitance between the plates ? What is Cmasc ? S
SECTION - II
5. p) State and explain Amperes Circuit law and hence prove that
H = a<J)(a < r < b). ' 8
2r\j
q) Find H at the centre of a square current loop of side A meters and a current of 5 amp is passing through it. 8
6. p) Find the flux crossing the plane surface defined by 0,5 < r < 2m, and 0 < z < 3m.
if B = -jait> Tesla. 8
q) State and explain Lorentz force equation. 8
7. p) Show that the displacement current inside the dielectric of parallel plate
capacitor is equal to the current flowing through the leads of the capacitor. 8
q) Derive the expression of wave equation for free space in terms of D, E, B. H - 8
8. p) Derive the expression of input impedance of a Transmission line. 9 q) Explain:
i) Single stub ii) Double stub matching. 9
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| Earning: Approval pending. |
