Download AKTU B-Tech 4th Sem 2014-15 Electronic Field Theory Question Paper

Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 4th Semester (Fourth Semester) 2014-15 Electronic Field Theory Question Paper

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Roll No. i
B. T?ch. _
?FM 1V) THEORY EXAMINATION, 2014 15
El .{FCTRONiC FIELD TH EORY
1? imurs; [Total Marks : 50
?Note : Attempt all qu?stions.
i Attempt am four questions : I 3.5><4=14
{11) P1010 1111; vector triple'product identity
;\ ? H >< C B=(AC) ?.??C(A..B)
?????
1?; b) What 15 the physwafslgm?cance of gradiem divergence
1nd curl.
(c) 1 vaiuate div (curl A) if ,
sin 11) C084)
A :: -~??- c1-?-?a
21 2 r
r_ .. r
' W111?
(d) State Divergence theorem and stokes' s thcmcm.
(e) 1F\ . x'press the vector in_Cartesian coordinates
. _?,_ 2 A . ?A
,4 -?r ar +5111 11a?1
1111111 ] ' ' ??519!" ?3?" 1 " [Co?td...'

; Var???" 331:? 2 ,swing vector : 4.3 an L ?.1191?301191i and
" 11mm '
A : ?ax + :my +xyaz.
Mt expt any two- r_gruestions : , 6X2?- 12
9 4'11 .1 1. the 1.110113111131 V :75? ?3? COS ?1? find the electlic
r 1
11.19: density D at1(2, -2-, 0)
(b) Linlist the properties of Conduwtors, die?ectriCs and
semiconductors.
(0) Don 1.e ?the expression for a:htpacitance of spherical
1.1111119110r using gausslaw. A spherical capacitor has
1adii a= 1.5 cm and b= 4cm has ?an inhomogeneous
_ ' ? 1080_ ? 5
.11electr1c of 8 = ' . Calculate the capm Hance of the
r 1
capacitor.
12.111: mp1 any two questions :_ 6><2=12
(9;) State Biot Savarts's?laWProvc that the magnetic ?eld
due to in?nite condu'ctojr. carryin"g?_:..comhmor I at a
distance r xs Ham ,
2m.- 7-
{b) State and explain Maxwell'e uluations Discuss its
111 1\ s11 a1 signi?cance. _
/ ~ I. I u ,
11-2) Derive an express?iqnforenergy 1n-magnet1c ?eld.

'- 2220 questions : @2212
T?wive {he ewpression of re?ection am. nansmission
goet?cimts ??/v2;rive the relanvn betwvnu 21w).
Cb) " ? 3nd LYM?i? Poynting 2% orem
22.2,: .2 =2 s"/?rm piano wave propr-;:.rting in medium 1'st
{C 2 2e?: sin (1081?? Bz)av ! /m.
\ * -2
f a medium is characterized by ?,,=L P', =10 and
0' = SS/m. Find 3
n") Attenuation constant
xi} Phase 2.2.mstant
222%) Velocity of propagation
222') P1 opagation constant
} Intrinsic impedance.