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the statements1 in filling a group of orbitals of equal energy it is energetically preferable to assign electrons to empty orbitals rather than
a ferrite core has less eddy current loss than an iron core because ferrites havea high resistancec low permeabilityb low resistanced high
the conductivity of copper is less than that of silver by a 5 - 10 b 50 - 60 c 80 - 90 d 20 - 30 ansthe conductivity of copper is less than silver
mica is aa dielectric material b insulating materialc magnetic material d both insulating and dielectric materialansmica is a both insulating and
for the energy levels in an atom which one of the following statements is correct1 there are seven principal electron energy levels2 the second
copper constantan is used for measuring temperature up toa 1400o cb 800oc c 1100ocd 400oc anscopper constantan is used for measuring temperature
paulis exclusion principle states that 1 nucleus of an atom contains no negative charge 2 electrons move in circular orbits around the
resistivity of conductors is most affected bya composition b temperaturec pressure
the dielectric strength of transformer oil should be a 100 v b 5 kv c 30 kv d 132 kvansthe
for germanium the forbidden gap isa 015evb 025evc 05evd 07evansfor germanium the forbidden gap is
copper is completely miscible witha nickelb goldc hydrogend leadanscopper is completely miscible with
in p-type semiconductor the majority carriers area holesb positive ionsc electronsd negative ionsansin p-type semiconductor the majority carriers are
a pure semiconductor under ordinary conditions behaves likea a conductor b an insulatorc a
eddy current loss is proportional to thea frequency b square of
manganin is an alloy ofa copper manganese and nickel b copper and manganesec manganese and nickel
hall effect may be used for which of the followinga determining whether the semiconductor is p or n typeb determining the carrier concentrationc
the relative permeability of a paramagnetic substance isa unity b slightly more than unityc zero
which of the following has the least energy1 2p 2 3p
ferrites area ferromagnetic materialb ferrimagnetic materialsc anti ferromagnetic materiald diamagnetic materialsansferrites are ferromagnetic
dielectric constant of vacuum isa infinityb 100c oned zeroansdielectric constant of vacuum is
the number of unpaired electrons in nitrogen is1 1 2 3 3 2 4 none of
how many unpaired electrons are present in cobalt co metal1 2 2 3 3
germanium possessesa one valence electronsb two valence electronsc three valence electronsd four valence electronsansgermanium possesses four valence
materials which provide a path to the magnetic flux are classified asa insulating materialsc magnetic materialsb semi conducting materialsd
the number of unpaired electrons in fe3 z 26 are1 5 2 6 3 3 4