Thursday, May 16, 2019

Electrical Engineering Material Lecture Notes for Bachelor of Technology in Electrical Engineering

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Conductivity of Metal: Introduction, factors affecting the resistivity of electrical materials, motion of an electron in an electric field, Equation of motion of an electron, current carried by electrons, mobility, energy levels of a molecule, emission of electrons from metals, thermionicb emission, photo electric emission, field emission, effect of temperature on electrical conductivity
of metals, electrical conducting materials, thermal properties, thermal conductivity of metals, thermoelectric effects.

Dielectric Properties: Introduction, effect of a dielectric on the behavior of a capacitor, polarization, the dielectric constant of monatomic gases, frequency dependence of permittivity,
dielectric losses, significance of the loss tangent, dipolar relaxation, frequency and temperature dependence of the dielectric constant, dielectric properties of polymeric system, ionic conductivity in insulators, insulating materials, ferroelectricity, piezoelectricity.

Magnetic properties of Materials: Introduction, Classification of magnetic materials, diamagnetism, paramagnetism, ferromagnetism, magnetization curve, the hysteresis loop, factors
affecting permeability and hysteresis loss, common magnetic materials, magnetic resonance.

Semiconductors: energy band in solids, conductors, semiconductors and insulators, types of
semiconductors, Intrinsic semiconductors, impurity type semiconductor, diffusion, the Einstein
relation, hall effect, thermal conductivity of semiconductors, electrical conductivity of doped

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