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concentration of electrons in the conduction bandat equilibrium there is no net current flowing across p-n junction concentration of electrons in the
explain why nichrome and not copper is used as heating element whereas manganin is used as standard resistancefor heating elements primary
discuss effect of impurity temperature and alloying on the electricity conductivity of metalfor an ideal crystal with no impurities and imperfections
what are the main sources of electrical resistance in a metal the factors which affect electrical resistance of a metal are impurity temperature and
explain experimental evidence to demonstrate the existence of ferromagnetic domainstemperature increases thermal motion or entropy competes with
explain curie point and hystereris an ordinary piece of iron generally has little or no net magnetic moment though if it is placed in a strong enough
describe the mechanism of ferromagnetismferromagnetism is the basic mechanism by which certain materials like iron form permanent magnets orand
discuss about the term - photolithography photolithography also known as optical lithography which is one of the kinds of lithography is a process
explain in detail about the chemical vapaor depositionchemical vapaor deposition cvd is a chemical process used to produce high-purity
what are the stages of heat treatment processall heat treatment processes comprises 3-main stepsi heating of metalalloy to the predetermined
illustrate objectives of heat treatment processesheat treatment is normally adopted for the followingi to refine grain structureii to improve
explain about the impact extrusion blank is placed over the die and pressed by punch metal is squirted upward round the punch thickness of the part
what is tube extrusion billet is placed inside a container between die and mandel mandel is pressed by ram and metal is extruded through the die this
define the both - direct extrusion and indirect extrusiondirect extrusion billet is placed in a container and forced through the die by a
illustrate process of extrusion in this process a round heated billet of metal which is placed in a container is forced out through a die in a press
state the functions of oxide layeri to mask against diffusion or ion-implantii to passivate surface electrically and chemicallyiii to isolate one
determine about the silicon silicon has a unique ability to be oxidized into silica that produces a chemically stable protective and insulating layer
what are the disadvantages of cold workingi higher forces are required for deformationii heavier and more powerful equipment is requirediii may
what are the advantages of cold workingi no heat is requiredii better surface finish is obtainediii superior dimension controliv improved strength
what is the foundation of classification of cold and hot working cold and hot workingchanging the shape of material by extrusion forging rolling
we are asked to design a qualitative analysis scheme that can be used to determine which cations are present in a solution containing only four of
what are ferrites ferrites are ceramic compounds containing trivalent metal having three valence electrons iron and oxide of divalent element ie
explain about the defect breakdown it is because of cracks and pores at the surface moisture from atmosphere can collect on the surface and result in
what is thermal breakdown it is because of the attainment of an excessive temperature in dielectric if heat dissipated is