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Code: 13A05305

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

B. Tech II Year I Semester Examinations, November/December - 2016

ELECTROMAGNETIC THEORY AND TRANSMISSION LINES

(Electronics and Communication Engineering)

Time: 3 Hours Max. Marks: 75

Note: This question paper contains two parts A and B.

Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks.

PART - A (25 Marks)

1. 1. State Coulomb's Law. [2M]

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   2. Define Electric Potential. [3M]
   3. State Ampere's Circuital Law. [2M]
   4. Define Magnetic Dipole moment. [3M]
   5. State Faraday's Law of electromagnetic induction. [2M]
   6. Define Displacement current. [3M]

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   7. Define Loss tangent. What is its significance? [2M]
   8. Define Intrinsic impedance. [3M]
   9. Define Reflection Coefficient. [2M]
   10. What are the applications of smith chart? [3M]

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PART - B (50 Marks)

2. Explain the concept of electric field intensity due to a line charge.

   OR

   Derive an expression for the capacitance of a parallel plate capacitor having two dielectrics. [10M]
3. Derive an expression for the magnetic field intensity on the axis of a circular loop carrying a steady current I.

   OR

   Derive Maxwell's equations for magneto static fields. [10M]
4. Explain the concept of statically and dynamically induced emf's. [10M]

   OR

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   Derive the Maxwell's equations from Faraday's law and Ampere's Law. [10M]
5. Explain the concept of EM wave propagation in good conductors. [10M]

   OR

   Discuss about the concept of polarization. Explain different types of polarization. [10M]
6. Derive the expressions for voltage and current at any point on a transmission line. [10M]

   OR

   Explain about single stub matching with relevant expressions. [10M]

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