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Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
PDDC SEMESTER-III EXAMINATION WINTER 2018
Subject Code:X31102 Date: 22/11/2018
Subject Name: Engineering Electromagnetics
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1

With neat clean diagram explain cylindrical coordinate system. Also define position vector unit vector.
07

The three vertices of a triangle are located at A B and C Find the length of the perimeter of the triangle and a unit vector that is directed from the midpoint of the side AB to the midpoint of the side BC.
07
Q.2

Derive the expression for the electric field intensity due to an infinitely long line charge lying on the z-axis at any arbitrary point
07

Express r2ar aØ in Cartesian coordinate system at point
07
OR

Point charges or 50 nC each are located at and in free space. Find the total force on the charge at A.
07
Q.3

State and explain Coulomb's Law.
07

Explain Farady's Law in brief.
07
OR
Q.3

Derive the expression for the electric field intensity due to an electric dipole.
07

Define potential and potential difference. Derive the expression for the potential field of a point charge.
07
Q.4

State and explain Bio Savart Law.
07

State and prove uniqueness theorem.
07
OR
Q.4

Write a short note on Ampere's circuital law.
07

Describe Lorentz force equation. And derive the force on a differential current element.
07
Q.5

State prove poynting theorem relating to the flow of energy at a point in space in and electromagnetic field.
07

State and explain the Faraday's law for the time varying fields.
07
OR
Q.5

State Maxwell's equations in point form and explain physical significance.
07

Write a brief note on Magnetic boundary conditions.
07