Fundamentals of Electromagnetic Fields and Waves

This course is for those who are pursuing a bachelor’s degree in electronics and communications engineering and is an advantage for them to get good knowledge and score well in the examinations.

Nowadays, electromagnetics plays a vital role because of the advancements in technology. Electronic circuits and network circuits have the limitation that they only describe the voltage, current resistance, etc., but they cannot  give the electric  field intensity, attenuation constant, phase constant, lambda, or wavelength types of parameters. Therefore, network theory fails to give the above parameters. So electromagnetic field theory is the advancement of network theory.

In this subject, you may know some fundamental concepts .

Section 1:  Deals with the the field, vector and scalar fields, unit vectors, position vectors ,distance vectors etc.,

Section 2:   Deals about vector algebra, which includes the dot product rules, some basic formulas of vector algebra and vector calculus, the cork screw rule, and the vector scalar triple product and scalar triple product discussed elaborately, which are required for solving the problems in electromagnetic fields theory.

Section 3 : This is all about the review of coordinate systems, which include the cartesian coordinate system or  rectangular coordinate system, cylindrical coordinate system, and spherical coordinate system. Next, we discussed point transformations like rectangular to cylindrical or vice versa as well as cylindrical to spherical or vice versa. We also discussed what the DEL operator is, why it was used, and how these  del operators are used  for divergence, curl, and gradient operations with some sort of rule. Next we also discussed the statements and mathematical approach of divergence theorem, curl for stokes theorem etc.,

Section 4: Discussed Coulomb’s law and vector form. Coulomb’s law for n number of charges, electric field intensity, and finding the electric field intensity for different charge distributions like point charge, infinite line and sheet charge and volume charge, etc., also find the electric flux density from the electric field intensity formulas. next we discussed the gauss law and its applications

Section 5: This section is all about the magnetostatics related to the H component. he first concept is the introduction of magnetostatics and Biot-Savarts law for finding H and magnetic field intensity H for circular loop. The next one is Amperes circuit law and its applications like infinite line elements, circular disc, and infinite sheet of charge etc., next is magnetic flux and magnetic flux density, magnetic scalar and magnetic vector potentials, etc. later  force due to different magnetic fields like .Amperes force law , Lorentz force etc.,

Maxwell’s equations for time varying fields like faraday’s law, transformer emf, and induced emf combined both the inconsistency of ampere’s law or modified ampere’s law and displacement current density. finally boundary conditions for different medias like dielectric-Dielectric and conductor

Section 5: Deals with what is a wave and an electromagnetic wave, and then the wave equations for dielectrics and conductors. Later we find the E/H or intrinsic impedance etc.,

Feel free to ask any doubts while learning the course

Happy learning!

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PUDI V V S NARAYANA