# JNTU Kakinada EEE Electromagnetic Fields Syllabus

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY

KAKINADA

II Year B.Tech EEE I-Sem T P C

4+1* 0 4

ELECTROMAGNETIC FIELDS

Objective :

The objective of this course is to introduce the concepts of electric field and magnetic fields and their

applications which will be utilized in the development of the theory for power transmission lines and

electrical machines.

UNIT – I Electrostatics :

Electrostatic Fields – Coulomb’s Law – Electric Field Intensity (EFI) – EFI due to a line and a surface

charge – Work done in moving a point charge in an electrostatic field – Electric Potential – Properties of

potential function – Potential gradient – Guass’s law – Application of Guass’s Law – Maxwell’s first law, div

( D )=rv

UNIT – II Conductors and Dipole:

Laplace’s and Poison’s equations – Solution of Laplace’s equation in one variable. Electric dipole – Dipole

moment – potential and EFI due to an electric dipole – Torque on an Electric dipole in an electric field –

Behavior of conductors in an electric field – Conductors and Insulators.

UNIT – III Dielectric & Capacitance :

Electric field inside a dielectric material – polarization – Dielectric – Conductor and Dielectric – Dielectric

boundary conditions, Capacitance – Capacitance of parallel plate and spherical and co-axial capacitors

with composite dielectrics – Energy stored and energy density in a static electric field – Current density –

conduction and Convection current densities – Ohm’s law in point form – Equation of continuity

UNIT – IV Magneto Statics :

Static magnetic fields – Biot-Savart’s law – Oesterd’s experiment – Magnetic field intensity (MFI) – MFI

due to a straight current carrying filament – MFI due to circular, square and solenoid current – Carrying

wire – Relation between magnetic flux, magnetic flux density and MFI – Maxwell’s second Equation,

div(B)=0.

UNIT – V Ampere’s circuital law and its applications

Ampere’s circuital law and its applications viz. MFI due to an infinite sheet of current and a long current

carrying filament – Point form of Ampere’s circuital law – Maxwell’s third equation, Curl (H)=Jc, Field due

to a circular loop, rectangular and square loops.

UNIT – VI Force in Magnetic fields :

Magnetic force – Moving charges in a Magnetic field – Lorentz force equation – force on a current element

in a magnetic field – Force on a straight and a long current carrying conductor in a magnetic field – Force

between two straight long and parallel current carrying conductors – Magnetic dipole and dipole moment –

a differential current loop as a magnetic dipole – Torque on a current loop placed in a magnetic field

UNIT – VII Magnetic Potential :

Scalar Magnetic potential and its limitations – vector magnetic potential and its properties – vector

magnetic potential due to simple configurations – vector Poisson’s equations.

Self and Mutual inductance – Neumans’s formulae – determination of self-inductance of a solenoid and

toroid and mutual inductance between a straight long wire and a square loop wire in the same plane –

energy stored and density in a magnetic field. Introduction to permanent magnets, their characteristics and

applications.

UNIT – VIII Time Varying Fields :

Time varying fields – Faraday’s laws of electromagnetic induction – Its integral and point forms –

Maxwell’s fourth equation, Curl (E)=-¶B/¶t – Statically and Dynamically induced EMFs – Simple problems

-Modification of Maxwell’s equations for time varying fields – Displacement current – Poynting Theorem

and Poynting vector.

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TEXT BOOKS

1. “Engineering Electromagnetics” by William H. Hayt & John. A. Buck Mc. Graw-Hill Companies, 7th

Editon.2006.

2. “Electro magnetic Fields” by Sadiku, Oxford Publications

REFERENCE BOOKS :

1. “Introduction to Electro Dynamics” by D J Griffiths, Prentice-Hall of India Pvt.Ltd, 2nd editon

2. “Electromagnetics” by J P Tewari.

3. “Electromagnetics” by J. D Kraus Mc Graw-Hill Inc. 4th edition 1992.

4. “Electromagnetic fields”, by S. Kamakshaiah, Right Publishers, 2007.