Download PTU B.Tech 2021 Jan ECE 3rd Sem 78748 Electromagnetic Waves Question Paper

Download PTU (Punjab Technical University) B.Tech (Bachelor of Technology) / BE (Bachelor of Engineering) 2021 January ECE 3rd Sem 78748 Electromagnetic Waves Previous Question Paper

Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (ECE) (Sem.?3)
ELECTROMAGNETIC WAVES
Subject Code : UC-BTEC-303-19
M.Code : 78748
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION-B c ontains F IVE questions c arrying FIVE marks eac h and s tud ents
have to atte mpt any FOUR q ues tions.
3 .
SECT ION-C contains THREE questions carrying T EN marks e ach and s tudents
have to atte mpt any T WO questio ns.
SECTION-A
Write briefly :
1)
What do you understand by VSWR?
2)
Define Skin depth in a wave.
3)
What is the significance of S-parameters?
4)
Give the mathematical relationship between VSWR and Reflection coefficient.
5)
How can you define Total Internal Reflection?
6)
Name various Co-ordinate systems that can be used in Vector calculus.
7)
Define: Phase velocity and Group velocity in a electromagnetic wave giving their
mathematical expressions.
8)
Give the significance of Poincare's Sphere.
9)
Give the types of Waveguides. List some applications of waveguides.
10) What is Attenuation in Waveguides?
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SECTION-B
11) State and Prove Poynting Theorem.
12) How can you describe the surface currents on the walls of a waveguide? Give field
visualization for current distribution in a parallel plane waveguide.
13) What are the major differences between Electromagnetic theory and Circuit Theory? List
some applications of Electromagnetic theory.
14) How can you represent a parallel plane Transmission line using an equivalent circuit?
15) Discuss low loss radio frequency and UHF transmission lines.
SECTION-C
16) Derive the Maxwell's wave equations for time-varying electromagnetic field in differential
form as well as integral form.
17) Discuss various propagation characteristics of EM waves in perfect conductors giving their
mathematical expressions.
18) Discuss Wave equation and its general solution in different media.
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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