ELECTROMAGNETIC THEORY

22EPC306-ElectroMagnetic Theory

Unit I Introduction

Sources and effects of electromagnetic fields – Vector fields – Different co-ordinate systems- vector Calculus – problems and physical significance of Gradient, Divergence and Curl - Divergence theorem – Stoke’s theorem. 

Unit II Electric Fields

Coulomb’s Law – Electric field intensity – Field due to point and continuous charges – Gauss’s law and application – Electric potential – Electric field and equipotential plots – Electric field in free space, conductors, - Electric field in multiple dielectrics – Boundary conditions, Poisson’s and Laplace’s equations – Capacitance- Energy density. 

Unit III Magnetic Fields

Lorentz Law of force, magnetic field intensity – Biot-Savart’s Law - Ampere’s Law – Magnetic field 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 magnetic potential – Magnetic force – Torque – Inductance – Energy density – Magnetic circuits. 

Unit IV Electromagnetic Fields

Faraday’s laws – induced emf – Transformer and motional EMF – Forces and Energy in quasi stationary  Electromagnetic  Fields  -  Maxwell’s  equations  (differential  and  integral  forms)  – Displacement current – Relation between field theory and circuit theory. 

Unit V Eletromagnetic Waves

Electromagnetic wave equations – Wave parameters: velocity, intrinsic impedance, propagation Constant – Waves in free space, Lossy and lossless dielectrics, conductors – skin depth, Poynting theorem, Poynting vector – Transmission lines – Line equations– Input impedances – Standing wave ratio and power. 


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