4EC4A ELECTROMAGNETIC FIELD THEORY |
| Units |
Contents of the subjects |
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I
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INTRODUCTION - Vector Algebra, different Coordinate system, Relation in
rectangular, cylindrical, spherical and general curvilinear coordinates system. Line,
Surface and volume integral, Concept and physical interpretation of gradient,
Divergence and curl. Divergence, Stoke’s and Green’s theorems. |
|
II
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ELECTROSTATICS -Electric field intensity & flux density (D). Electric field due
to various charge configurations. Gauss’s law, divergence of electric flux and
maxwell’s first equation, The potential functions and gradient of electric
potential.Maxwell curl equation for static electric field. Poisson’s and Laplace’s
equation and their solution. Divergence of current density (J) and Continuity
equation for current. Duality of J and D, Capacitance and electrostatics energy. Field
determination by method of images, Boundary conditions, Field mapping and
concept of field cells. |
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III
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MAGNETOSTATICS - Bio-Savart’s law, Ampere’s circuital law Magnetic field
intensity H, flux density B & magnetization M, their interrelation. Curl of H.
Magnetic scalar and vector potential, Faraday’s Law, self & mutual inductance,
Energy stored in magnetic field, Boundary conditions, Analogy between electric and
magnetic field, Field maping and concept of field cells. |
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IV
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TIME VARYING FIELDS - Displacement currents, displacement vector and
equation of continuity. Maxwell’s equations, Uniform plane wave in free space,
dielectrics and conductors, Depth of penetration-skin effect, Sinusoidal time
variations, Reflection & Refraction of Uniform Plane Wave, standing wave ratio.
Pointing vector and power considerations.
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V
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RADIATION, EMI AND EMC - Retarded Potentials and concepts of radiation,
Radiation from a small current element. Radiation Resistance: Introduction to
Electromagnetic Interference and Electromagnetic compatibility, EMI error in
equipments, EMI standard, EMI coupling modes, Methods of eliminating
interference, shielding, grounding, conducted EMI, EMI testing: emission testing,
susceptibility testing. |