Shivaji University 2009-5th Sem B.E Electrical Engineering T.E(Electrical)- , Electromagnetics (New ) - Question Paper
This is fifth semester paper for the 3rd year students of 'Electromagnetics' subject consisting of 2 parts of 50 marks each, totaling 100 marks.
3. a) Deri ve the c,\ p res s io ns for c ap aci lance clue io eo- u xiii I cable of inner radius' a
and outer radius b' and Length 'V. S
b) Two conducing spherical .shells have radii of a - 2 cm and b - 5 cm. The interior is aperfce1 die! eciric for which eR =10. (a) Find C (b) A portion-of thedieleiric is now removed so Chat
& t, 0 < 0 < s aru'J t-k - 10, % < % < k . Find C, 8
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4. a) Scale Gauss law and prove ihar. div. D p y nd he;xe obtain Poisons equation I0
b) State and prove die boundary conditions satisfied by stauc electric field a; an interface 'between a dielectric and perfect. conductor. 8
SECTION - ii
5. a) State Ar/ipere's law of force and use the sa?ne to fiad the expression for die
.xagnedc field due to a cisttctu demem. $5
b) Given fhe field be H-6fsin*bv -f i8rsinOc0saVj evaluate both sides of Stokes theorem for fe portion of the cone B ~ ()An bottled by r - 2, r - 4,
9- 0 and <b - 0.3. Lei the direc-tEon or ds be * . 8
6. a) Stale and explain BioLSavari law. H
b} A 6 m. i ong straight filamentary conductor carrying a current of 4 ainp is placed <don>i poskiyc x-axis wtth its end at origin, land oik the magnedc field .intensity i point P(0t 3. 3). 8
1. a) Write down the Maxwell \s equations in dieir point form and integral form.
Siiiie the meaning of each equation in Stade field. 8
b) A conductor of length 2.5 in located at z = 0, x - 4 in carries a etirreni of 12 amp in ihe ay direaioxv Find the magnetic fax in the region if the force
on the conductor is 1.2 x 10 2N in the dirccuon . ti
J2
8. a) Explain wave equations for conductors in terms of 15, H, H, D. 8
b) What i ,s meaa b v sai b ? Ex. plain sinde sin b and do 11 bie s ra b re arch inc. I
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