Syllabus - Electrical Engg. Material (EE-503 (C))

Conducting Material

Classification and main properties, High resistivity alloy: ConstantMangann, Nichrome, Electrochemical, properties of copper, Aluminum, steel tungsten, Molybdenum, Platinum, Tantalum, Niobium, Mercurry, Nickel, Titanum, Carbon, Lead, thermal, Bitmetals,thermocouple,materials, specific resistance, conductance, variation of resistance with temperature, super conductors.

Semi-Conductor Materials

General conception, variation of electrical conductivity, Elementshaving semiconductor properties, general application, hall effect, energy levels, conduction insemiconductors, Intrinsic conduction, impurity conduction, P and N type impurities, electrical change,Neutrality, Drift, Mobility current flow in semiconductors P-N junction formation by alloying, Elasing(forward and reverse) of P-n junction, Reverse separation current, Zener effect, Junction,capacitance, hall defects and hall coefficient.

Magnetic Materials

Details of magnetic materials, reduction between B.H. and , soft and hardmagnetic materials. Di-magnetic, Para magnetic and Ferromagnetic materials, electrical sheet steel,cast iron. Permanent magnetic materials. Dynamic and static hysteresis loop. Hysteresis loss, eddycurrent loss, Magnetisation, magnetic susceptibility, coercive force, core temperature, rectangularhysteresis loop, Magnet rest square loop core materials, iron silicon, Iron alloys

Insulating Materials

General electrical mechanical and chemical properties of insulatingmaterial, Electrical characteristics volume and surface resistivity complex permitivity loss, anddielectric loss, equivalent circuits of an imperfect dielectric polarization and polarizability classification of dielectric.

Mechanical Properties

Classification insulating materials on the basis of temperature rise. Generalproperties of transformer oil, commonly used varnishes, solidifying insulating materials, resins,bituminous waxes, drying oils, Fibrous insulating materials, wood, paper and cardboard, insulatingtextiles, varnished adhesive tapes, inorganic fibrous material and other insulating materials, such asmica, ceramic, bakelite, ebonite, glass, PVC, rubber, other plastic molded materials.