Download PTU B-Tech EEE 2020 Dec 4th Sem 57106 Electromagnetic Fields Question Paper

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Total No. of Pages : 02
Total No. of Questions : 18

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B.Tech.(EE)/(Electrical & Electronics Engg.) (2012 Onwards) /
(Electronics & Electrical Engg.) (2012 to 2017)
(Sem.-4)

ELECTROMAGNETIC FIELDS
Subject Code : BTEE-403

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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.

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3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

SECTION-A

Write briefly :

1. Explain the difference between the divergence and curl of a vector field.
2. State Helmholtz Theorem.

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3. Define Equipotential Surfaces.
4. What is electric field intensity?
5. What is Lorentz force equation?
6. Define Magnetic Vector Potential.
7. Explain the significance of equation of continuity.

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8. What is static field?
9. What is skin effect?
10. What is surface impedance?

SECTION-B

1. State and prove the Green’s Theorem.

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2. Discuss Analogies between electric and magnetic fields.
3. Discuss energy stored in magnetic fields.
4. In free space, electric field density, D = 10sin(?t + ßz) a_x, find magnetic flux density B, E and H.
5. State and discuss boundary conditions.

SECTION-C

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1. What is meant by uniform plane wave? Derive wave equation in terms of electric field and magnetic field.
2. Discuss and explain reflection of waves by a perfect dielectric (Normal incidence).
3. State and Derive Poynting Theorem.

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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