PTU B.Tech 4th Semester Last 10 Years 2009-2019 Previous Question Papers|| Punjab Technical University
| Roll No. | Total No. of Pages : 02 |
| Total No. of Questions : 09 |
B.Tech.(EIE) (2011 & Onwards) (Sem.-4)
ELECTROMAGNETIC FIELD THEORY
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| Subject Code : EC-208 | M.Code : 57513 |
| Time : 3 Hrs. | Max. Marks : 60 |
INSTRUCTIONS TO CANDIDATES :
- SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
- SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
- SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.
SECTION-A
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- Answer briefly :
- Differentiate between scalar quantity and a scalar field and vector quantity and a vector field.
- Discuss the cartesian coordinate system.
- What is a waveguide? What is its importance and applications?
- Define Propagation constant.
- Define clearly dominant and degenerate modes with examples.
- State the significance of smith chart and its features.
- What is meant by characteristic impedance of transmission line?
- State and prove Gauss law.
- What is the equation of continuity for steady currents?
- What are the condition for field to be irrotational?
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SECTION-B
- Write and explain Maxwell's equation for static and time varying fields in both differential and integral form.
- Explain the electromagnetic wave is transverse in nature.
- Discuss the use of low loss RF and UHF transmission lines.
- A rectangular waveguide with dimensions 4cm ×2cm operates at 10GHz. Find fc and ?c of TE10 mode.
- Explain in brief skin effect.
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SECTION-C
- Derive the boundary conditions for time varying fields.
- Discuss reflection of electromagnetic wave from a perfect insulator incident obliquely.
- What is understood by polarization of EM waves? Explain linear, elliptical and circular polarization with appropriate figures.
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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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