Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 5th Sem 151002 Engineering Electromagnetics Previous Question Paper
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?V (OLD) EXAMINATION ? WINTER 2020
Subject Code:151002 Date:03/02/2021
Subject Name:Engineering Electromagnetics
Time:10:30 AM TO 12:30 PM Total Marks:56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) i) Express point P(-2,6,3) in the cylindrical and spherical co-ordinate system.
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ii) Explain Dot product and Cross product in brief.
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(b) Define Coulomb's law and derive the expression for electric field intensity E
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due to point charge.
Q.2 (a) State Gauss's law and derive the Maxwell's first equation. Determine Electric
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flux density D for spherical Gaussian surface with point charge at the center.
(b) Two dipoles with dipole moments -5az nC/m and 9az nC/m are located at points
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(0, 0,-2) and (0, 0, 3) respectively. Find the potential at the origin.
Q.3 (a) Explain Uniqueness theorem in detail.
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(b) Derive an expression for the capacitance of spherical capacitor.
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Q.4 (a) State and derive Biot-Savart's Law.
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(b) Explain Maxwell's equations in Point and Integral Form.
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Q.5 (a) Explain how plane wave moves in free space with help of the neat diagram.
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(b) Derive magnetic boundary conditions for B and H between two magnetic
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mediums.
Q.6 (a) Derive the expression of the Poynting vector.
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(b)
Generate the expression for Continuity of current.
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Q.7 (a) Derive magnetic dipole moment for the rectangular planar loop in a uniform
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magnetic field.
(b) A cylindrical capacitor has radii a= 1cm. and b=2.5 cm. If the space between
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the plates is filled with an inhomogeneous dielectric with r = (10 + )/ , where
is in centimeters, find the capacitance per meter of the capacitor.
Q.8 (a) Explain Faraday's law with neat diagram.
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(b) For a vector field A show that, the divergence of the curl of A is zero.
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This post was last modified on 04 March 2021