Electromagnetic Theory

EE3301

ELECTROMAGNETIC FIELDS

COURSE OBJECTIVES:

• To introduce the basic mathematical concepts related to electromagnetic vector fields

• To impart knowledge on the concepts of

✓ Electrostatic fields, electric potential, energy density and their applications.

✓ Magneto static fields, magnetic flux density, vector potential and its applications.

✓ Different methods of emf generation and Maxwell's equations

✓ Electromagnetic waves and characterizing parameters

UNIT - I

ELECTROSTATICS - I

Sources and effects of electromagnetic fields - Coordinate Systems - Vector fields -Gradient, Divergence, Curl - theorems and applications - Coulomb's Law - Electric field intensity - Field due to discrete and continuous charges - Gauss's law and applications.

UNIT II

ELECTROSTATICS - II

Electric potential - Electric field and equipotential plots, Uniform and Non-Uniform field, Utilization factor - Electric field in free space, conductors, dielectrics - Dielectric polarization -Dielectric strength - Electric field in multiple dielectrics - Boundary conditions, Poisson's and Laplace's equations, Capacitance, Energy density, Applications.

UNIT III

MAGNETOSTATICS

Lorentz force, magnetic field intensity (H) - Biot-Savart's Law - Ampere's Circuit Law - H due to straight conductors, circular loop, infinite sheet of current, Magnetic flux density (B) - B in free space, conductor, magnetic materials - Magnetization, Magnetic field in multiple media -Boundary conditions, scalar and vector potential, Poisson's Equation, Magnetic force, Torque, Inductance, Energy density, Applications.

UNIT IV

ELECTRODYNAMIC FIELDS

Magnetic Circuits - Faraday's law - Transformer and motional EMF - Displacement current -Maxwell's equations (differential and integral form) - Relation between field theory and circuit theory - Applications.

UNIT V

ELECTROMAGNETIC WAVES

Electromagnetic wave generation and equations - Wave parameters; velocity, intrinsic impedance, propagation constant - Waves in free space, lossy and lossless dielectrics, conductors- skin depth - Poynting vector - Plane wave reflection and refraction.

TOTAL: 60 PERIODS

COURSE OUTCOMES:

Upon the successful completion of the course, students will be able to:

CO1: Visualize and explain Gradient, Divergence, and Curl operations on electromagnetic vector fieldsand identify the electromagnetic sources and their effects.

CO2: Compute and analyse electrostatic fields, electric potential, energy density along with their applications.

CO3: Compute and analyse magneto static fields, magnetic flux density, vector potential along with their applications.

CO4: Explain different methods of emf generation and Maxwell's equations

CO5: Explain the concept of electromagnetic waves and characterizing parameters

TEXT BOOKS:

1. Mathew N. O. Sadiku, S.V. Kulkarni 'Principles of Electromagnetics', 6th Edition, Oxford University Press Inc. Asian edition, 2015.

2. William H. Hayt and John A. Buck, 'Engineering Electromagnetics', McGraw Hill Special Indian edition, 2014.

3. Kraus and Fleish, 'Electromagnetics with Applications', McGraw Hill International Editions, Fifth Edition, 2010.

REFERENCES

1. V.V.Sarwate, 'Electromagnetic fields and waves', Second Edition, Newage Publishers, 2018.

2. J.P.Tewari, 'Engineering Electromagnetics - Theory, Problems and Applications',

Second Edition, Khanna Publishers 2013.

3. Joseph. A. Edminister, 'Schaum's Outline of Electromagnetics, Fifth Edition (Schaum's Outline Series), McGraw Hill, 2018.

4. S.P.Ghosh, Lipika Datta, ‘Electromagnetic Field Theory', First Edition, Mc Graw Hill Education(India) Private Limited, 2017.

5. K A Gangadhar, 'Electromagnetic Field Theory', Khanna Publishers; Sixteenth Edition Eighth Reprint:2015