Download PTU B.Tech 2020 March ECE 3rd Sem BTEC 303 18 Electromagnetic Waves Question Paper

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Roll No. [T | Total No. of Pages : 02

Total No. of Questions : 09

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B.Tech.(ECE) (2018 Batch) (Sem.-3)

ELECTROMAGNETIC WAVES

Subject Code : BTEC-303-18

M.Code : 76446

Time : 3 Hrs. Max. Marks : 60

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INSTRUCTIONS TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

SECTION-A

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1. Write briefly :
   1. Differentiate between reflection and refraction of a plane wave. Explain.
   2. Explain how VSWR can be determining using smith chart?
   3. Classify the types of transmission lines.
   4. Define propagation constant:
   5. Define clearly dominant and degenerate modes with examples.

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   6. State the significance of smith chart and its features.
   7. What is meant by characteristic impedance of transmission line?
   8. Define polarization.
   9. What is the equation of continuity for steady currents?
   10. What are the condition for field to be irrotational?

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SECTION-B

2. Write and explain Maxwell’s equation for static fields.
3. Explain the electromagnetic wave is transverse in nature.
4. Discuss about lossless and distortionless transmission lines.

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5. A rectangular waveguide with dimensions 4cm x 2cm operates at 10 GHz. Find f. and ? of TE10 mode.
6. Write short note on wave impedance for free space.

SECTION-C

6. Write a short note on reflection of uniform plane wave.
7. Discuss reflection of electromagnetic wave from a perfect insulator incident obliquely.

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8. What is understood by polarization of EM waves? Explain linear, elliptical and circular polarization with appropriate figures.

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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