electromagnetics
Module 3
syllabus
Propagation of plane EM wave in perfect dielectric, lossy medium, good conductor, media attenuation, phase velocity, group velocity, skin depth. Reflection and re:fraction of plane electromagnetic waves at boundaries for normal & oblique incidence (parallel and perpendicular polarization), Snell's law of refraction, Brewster angle.
Video Lectures
Propagation of EM wave in a conducting medium (Lossy dielectric) | EM - Module 3 | Lecture 46
Topics covered
Derivation of propagation of EM wave in a conducting medium
Propagation of EM wave in Lossy dielectric
Expression of propagation constant
Expression of attenuation constant
Expression of phase shift constant
Scalar wave equation
Expression of intrinsic impedance (eta) for perfect dielectric
Propagation of EM wave in perfect dielectric (Lossless dielectric) | EM - Module 3 | Lecture 47
Topics covered
Derivation of propagation of EM wave in a perfect dielectric
Expression for : Attenuation constant, Phase shift constant, propagation constant, intrinsic impedance, wave length, velocity
Propagation of EM wave in good conductor | EM - Module 3 | Lecture 48
Topics covered
Derivation of propagation of EM wave in a good conductor
Expression for : Attenuation constant, Phase shift constant, propagation constant, intrinsic impedance, wave length, velocity
Derivation of attenuation & phase shift constant | EM - Module 3 | Lecture 49
Topics covered
Q) Derive the expression for attenuation constant and phase shift constant in a lossy dielectric
Calculation of alpha & beta of wave equation
Skin depth & Skin effect | EM - Module 3 | Lecture 50
Topics covered
Skin depth
Skin effect
Phase velocity & Group velocity | EM - Module 3 | Lecture 51
Topics covered
Phase velocity
Group velocity
Animation explanation
Reflection of plane wave at normal incidence | EM - Module 3 | Lecture 52
Topics covered
Derivation of reflection of plane wave at normal incidence
Derivation of reflection coefficient (Γ)
Derivation of transmission coefficient (τ)
Reflection of plane wave at oblique incidence | Snell's law | EM - Module 3 | Lecture 53
Topics covered
Derivation of reflection of plane wave at oblique incidence
Derivation of Snell's law
EMW oblique incidence - case 1: Parallel Polarization | Brewster angle | EM - Module 3 | Lecture 54
Topics covered
Reflection of plane wave at oblique incidence - case 1 : Parallel polarization
Brewster angle
Fresnel's equation for parallel polarization
Reflection coefficient - Parallel polarized EM wave
Transmission coefficient - Parallel polarized EM wave
EMW oblique incidence - case 2: Perpendicular Polarization | Brewster angle | EM - M-3 | Lecture 55
Topics covered
Reflection of plane wave at oblique incidence - case 2 : Perpendicular polarization
Brewster angle
Fresnel's equation for perpendicular polarization
Reflection coefficient - Perpendicular polarized EM wave
Transmission coefficient - Perpendicular polarized EM wave
Solved Problem 1 -Step by step solution - Module 3 | EM - Module - 3 | Lecture 56
Topics covered
Step by step solution
Q) An EM wave is designated by E=30 cos〖(2π×〖10〗^6 t-βx) a_y 〗 is passing through a lossless dielectric medium of μr=3 and εr=27 having frequency f=200Mz. Determine β, λ ,ʋp and η
Solved Problem 2 -Step by step solution - Module 3 | EM - Module - 3 | Lecture 57
Topics covered
Step by step solution
Q2) A uniform plane wave propagating in a medium has E=2e^(-αz) sin〖(〖10〗^8 t-βz) a_y 〗 V/m. If the medium is characterised by εr=1, μr=20 and σ=3 s/m Find α,β & H
Solved Problem 3 -Step by step solution - Module 3 | EM - Module - 3 | Lecture 58
Topics covered
Step by step solution
Q3) In a lossless dielectric for which η=60π, μr=1 and H=−0.1 cos(ωt−z) a_x+0.5 sin(ωt−z) a_y A/m. calculate εr, ω and E
Solved Problem 4 -Step by step solution - Module 3 | EM - Module - 3 | Lecture 59
Topics covered
Step by step solution
Q4) Determine the skin depth in good conductor (conductivity σ=3.2×107 mhos/m) at frequency 10Mhz where μr=1
Solved Problem 5 -Step by step solution - Module 3 | EM - Module - 3 | Lecture 60
Topics covered
Step by step solution
Q5) Given two dielectric media, the first medium is free space and the second medium has ε2 =4ε_0 and μ=μo. Find the reflection coefficient for oblique incidence at θ1= 30° for
i) perpendicular polarisation and ii) parallel polarisation