Electromagnetics

Course Title: Electromagnetics

Course No: ENEX 254

Nature of the Course: Theory + Lab

Semester: 4

Full Marks: 40 + 60 + 25

Pass Marks: 16 + 24 + 10

Credit Hours: 3

Course Description

Electromagnetics provides students with basic mathematical concepts related to electromagnetic time invariant and time variant fields including electromagnetic waves and their transmission on different media. Topics include electric fields, magnetic fields, time varying fields, plane waves, and transmission lines.

Course Objectives

The objective of this course is to provide students with a basic mathematical concepts related to electromagnetic time invariant and time variant fields including electromagnetic wave and their transmission on different media.

Course Contents

1. Introduction

4 hrs5 marks

1.1. Scalar and vector fields

1.2. Operations on scalar and vector fields

1.3. Co-ordinate systems (Cartesian, cylindrical and spherical) and conversions

2. Electric Field

15 hrs20 marks

2.1. Coulomb's law

2.2. Electric field intensity

2.3. Electric flux density

2.4. Gauss's law and applications

2.5. Physical significance of divergence, divergence theorem

2.6. Electric potential, potential gradient

2.7. Energy density in electrostatic field

2.8. Electric properties of material medium

2.9. Free and bound charges, polarization, relative permittivity, electric dipole electric boundary conditions

2.10. Current, current density, conservation of charge, continuity equation, relaxation time

2.11. Boundary value problems, Laplace and Poisson equations and their solutions, uniqueness theorem

3. Magnetic Field

9 hrs12 marks

3.1. Biot-Savart's law

3.2. Magnetic field intensity

3.3. Ampere's circuital law and its application

3.4. Magnetic flux density

3.5. Physical significance of curl, Stoke's theorem

3.6. Scalar and magnetic vector potential

3.7. Magnetic properties of material medium

3.8. Magnetic force, magnetic torque, magnetic moment, magnetic dipole, magnetization

3.9. Magnetic boundary condition

4. Time Varying Fields

4 hrs6 marks

4.1. Faraday's law, transformer EMF, motional EMF

4.2. Displacement current

4.3. Maxwell's equations in integral and point forms

5. Plane Waves

9 hrs12 marks

5.1. Wave propagation in lossless and lossy dielectric

5.2. Plane waves in free space, lossless dielectric, good conductor

5.3. Power and poynting theorem average power density

5.4. Reflection of plane wave at normal incidence

5.5. Standing wave and SWR

5.6. Input intrinsic impedance

6. Transmission Lines

4 hrs5 marks

6.1. Transmission line equations (Taking analogy from wave equations)

6.2. Lossless, lossy and distortionless transmission lines

6.3. Input impedance, reflection coefficient, standing wave ratio

Laboratory Works

Practical sessions of 22.5 hours covering electrostatic field mapping using Teledeltos paper, determination of dielectric constant and magnetic hysteresis, wave propagation on lumped parameter transmission lines, microwave sources and detectors, standing wave patterns, and familiarization with electric and magnetic field measurement using simulation tools.

1.Teledeltos (Electro-conductive) Paper Mapping of Electrostatic Fields
2.Determination of Dielectric Constant, Display of a Magnetic Hysteresis Loop
3.Studies of Wave Propagation on a Lumped Parameter Transmission Line
4.Microwave Sources, Detectors, Transmission Lines
5.Standing Wave Patterns on Transmission Lines, Reflections, Power Measurement
6.Familiarizations of Electric and Magnetic Field Measurements Using Simulation Tool

Reference Books

1.Hayt, W. H. (2001). Engineering Electromagnetics. McGraw-Hill Book Company.
2.Kraus, J. D. (1973). Electromagnetics. McGraw-Hill Book Company.
3.Rao, N. N. (1990). Elements of Engineering Electromagnetics. Prentice Hall.
4.Devid K. Cheng, (1989). Field and Wave Electromagnetics. Addison-Wesley.
5.Sadiku, M. N. O. (2010). Elements of Electromagnetics. Oxford University Press.

Notes:

This syllabus follows the official BEI curriculum of Tribhuwan University. In case of any doubt or revision, the university's published syllabus shall be considered authoritative. https://ioe.tu.edu.np/pages/electronics-engineering-curriculum-structure-2660

The questions will cover all the chapters in the syllabus. There may be minor deviation in marks distribution.

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