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a nozzle of 50 mm dia delivers a stream of water that strikes a flat plate which is held normal to the axis of stream if the issuing jet has a
a 50 mm dia jet having a velocity of 18 msec impinges without shock on a flat plate inclined at an angle to the axis of jet if the plate is moving at
the covers of electrical machines are made ofa soft magnetic materials b hard magnetic materialsc super
in n type semi conductor added impurity isa
property of material which allows it to be drawn out into wires isa
brass is an alloy ofa copper and zinc b copper and ironc copper and aluminium d copper and tinansbrass is an alloy of copper and
name the various magnetically hard alloysseveral of the magnetically hard materials are rare earth carbon steel cobalt tungsten steel alnico hard
what are hard magnetic materialshard magnetic materials- they have a slowly rising magnetization curve along with large hysteresis loop area and
distinguish between ferromagnetic and diamagnetic materials mentioning at least one example of eachferromagnetic materials these are materials
distinguish between paramagnetic and diamagnetic materials mentioning at least one example of eachparamagnetic materials the atoms of these materials
distinguish between ferromagnetic and paramagnetic materials mentioning at least one example of eachferromagnetic materials these are materials
give the properties and applications of bakelitethis is most common type of phenol formaldehyde this is hard thermosetting dark coloured materialits
give the properties and applications of teflonteflon this is acquired by the polymerisation of tetrafloourethyleneproperties1 this has good
give classification of plastics and also the differences between themplastics are materials containing carbon as common element that have organic
what are plastics plastics are materials containing carbon as common element that have organic substances of high molecular weight and are able of
explain the chemical properties of insulating materialschemical properties-chemical resistance presence of gases acids water alkalies and salts
classify the different types of insulating materials with reference to their limiting safe temperatures for useon the basis of insulating materials
describe properties of the conducting materials conducting materials are classified by low resistivity materials and high resistivity materialslow
classify the conducting materials conducting materials are classified by low resistivity materials and high resistivity materialslow resistivity
explain contact resistancecontact resistance it is measured as the voltage drop from tail to tail of the mated contacts along with specified current
explain corrosioncorrosion the process of constant eating or destruction up of metals by the surface by the surrounding is termed as corrosion these
explain dielectric constantdielectric constant this is also termed as permittivity all insulating material possesses an electrical capacitance such
what is permeabilitypermeability this is defined as the ability of the material to conduct flux this is defined as the ratio of magnetic flux b in a
what is the desirable properties of an insulation materialinsulation materials have the desirable properties are as follows1 very fine dielectric
explain polymerisation vinyl chloride and its applicationspvc and its applications - it is acquired from polymerisation of vinyl chloride in the