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

Printed Pages : 3
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(Following Paper ID and Roll No. to be ?lled in your Answer Book)
PAPER ID : 130402
Roll N 0.
B. Tech.
(SEM. IV) THEORY EXAMINATION, 2014-15
ELECTROMAGNETIC FIELD THEORY
Time : 3 Hours] [Total Marks : 100
Note : Attempt all problems.
1 Answer any four parts of the following. 5X4=20
, /\
(3) Convert (x / y2+22) j into cylindrical system.
(b) Give the physical signi?cances and symbol of curl,
gradient and divergence.
(0) Calculate the electric ?eld intensity at the distance
of h produced by the circular sheet of radius r
and charge density PS.
(d) Discuss following theorems in detai l: ?
(1) Stokes
(2) Greens
(3) Uniqueness
130402] 1 I Contd...

(e) Calculate the distance in between (5,6,7) and
(50,60?,70?).
(1) State and prove Gauss theorem.
Answer any two parts of the following 10X2=20
(A) Calculate the energy stored by a cube which is
having E as (l, 2, 4) Deduce the result also.
(B) Using both the side of divergence theorem calculate
the charged enclosed by a
. /\ . /\
D =rsm29ar +rcosG sm?ar -
(C) DiSCuss :
(1) Continuity equation (2) Poisson's equations
(3) Laplace equation (4) Ampears rule.
Answer any two parts of the following- 10X2=20
(A) Calculate the capacitance formed by two back
to back cones separated by in?nitely small distance.
(B) Calculate the inductance of the toroid having
circular cross sectional area.
. (C) Calculate the E vector of an Eagle bird along-
with angle w.r.t. 2 interface which can kill the ?sh
in river and having E = (2, 3, 4).
130402] 2 l Contd...
Answer any two parts of the following- 10X2=20
(A) Draw the model of transmission line. Deduce the
result of line impedance. Prove that it is repeated
at every distance of N2.
(B) A plane wave whose E vector is parallel to
incidence, is penetrating the ocean and then
submarine at 1 GHz, Discuss the phenomenon which
is occurring on the interfaces. What will happen
when E vector is normal to the interface?
(C) What is displacement current? Write down the
Maxwell's equation for time varying ?elds. Using
these equations deduce the results of poynting
theorem.
Write short notes on any four of the following. 5X4=20
(1) Smith chart
(2) Method of images
(3) Waveguides
(4) Phase and group velocity
(5) Skin depth
(6) Quaner wave transformer.
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