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salient properties of common semiconducting materials the salient properties of semi-conducting materials are these are the materials whose
explain the fermi energythe fermi energy generally refers to the energy of the highest get quantum state in a system of fermions at absolute zero
the various types of polarization processes area electronic polarizationb ionic polarizationc orientation polarization andd space
explain the phenomenon of polarization in dielectric materialspolarization in dielectric materialsif a material contains polar molecules they will
the magnetic behavior of materials can be classified into the following five major groups 1 diamagnetism 2 paramagnetism 3 ferromagnetism 4
the various common conducting materials used are1 copper2 aluminium3
describe various properties and applications of mica and transformer oilproperties and uses of micamica has a high dielectric strength and good
brazing and soldering - both soldering and brazing processes are useful for combination two dissimilar metals both brazing alloy and solder have
explain epitaxial growth epitaxial growth - refers to the growing of a crystal using one more crystal as the substrate like that the atomic
oxidation - silicon has the unique ability to be oxidized into silica which produces a chemically stable protective and insulating layer on the
in what manner hot worked and cold worked products differhot working of a metal is carried out above its re-crystallization temperature in this case
what are the objectives of heat treatment of metalsobjectives of heat treatment- cause relief of internal stresses developed while cold working
explain ferromagnetic materialsferromagnetic materials are those with spontaneous magnetic alignment ferromagnetism is the property of a material to
explain antiferromagnetic materialsantiferromagnetic materials are the materials in which almost every magnetic dipole is linked up ant parallel to
applications piezoelectric materials serve as a source of ultrasonic waves at sea they might be used to calculate depth distance of shore position of
what is piezoelectricitypiezoelectricity piezoelectricity gives us a means of changing electrical energy to suppose new geometric positions and
distinguish between intrinsic and extrinsic semiconductorin intrinsic semiconductors the conduction is because of the intrinsic processes
what are the main sources of electrical resistance in a metalthe factors that affect the electrical resistance of a metal are impurity temperature
explain the mechanism of ferromagnetismferromagnetism is the basic mechanism by which certain materials like iron form permanent magnets andor
what are the objectives of heat treatment processesthe heat treatment is generally adopted for the followingi to refine grain structureii for
what are its applicationsi direct extrusion the billet is placed in a container and forced by the die through a piston ii
explain the process of extrusionin this process a round heated billet of metal placed in a container is forced out by a die in a press this process
what are the functions of oxide layer in high quality ic explain silicon has the unique ability to be oxidized into silica which makes a
advantages of cold workingi no heat is neededii better surface finish is getiii superior dimension controliv improved strength and
what is the basis of classification of hot and cold workingcold and hot workingchanging the shape of material by extrusion forging rolling and