U V601 Pages: 6

Reg No.: Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY SIXTH SEMESTER B.TECH
DEGREE EXAMINATION, APRIL 2018 Course Code: EC352 Course Name:
COMPREHENSIVE EXAM (EC)

Max. Marks: 50 Duration: 1 hour

Instructions:
E
Each question carries one mark. No negative marks for wrong answers All
questions are to be answered.
If mre than, one option is chosen, it will not be considered for valuation. Calculators are
not permitted
E H H

1. Maxwell’s divergence equation for the magnetic field is given by

a) ए &?=0 4 b)V.B=0 c)VxB=p १9) ए . 85४9

2. Which of the following statements is correct with regard to the directions of and in TEM mode
of propagation
a) Both and are entirely transverse to the direction of propagation.

b) 15 entirely transverse to and has component in the direction of propagation. -
€) has a component in the direction of propagation.

d) Both and has a component in the direction of propagation.

3. If VSWR is 3 , then magnitude of reflection coefficient will be
a) 1/4 b) 1/3 ௦) 1/2 d) 1

4. An air filter rectangular waveguide has dimensions 6 x 4 cm, the cutoff frequency for 10 is
a) 2.5 GHz b) 25 GHz ©) 25 तर 005 GHz

5. Phase velocity Vpand group velocity ‏ع۷‎ in a waveguide (C is velocity of light) are related as
a) V,Vp=C? b) Vg Vp=C c) Ve /Vp=C d) Ve Vp= VC

6. The dominant mode in TE wave
a) ۱ b) 115 01 c) TE 10 d) TE 12

7. The depth of penetration of a wave in a loosy dielectric increase with increasing
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