Materials and Components If a small amount of Cu is added to Ni conductor, then Resistivity of Ni remains the same Resistivity of Ni will decrease at all temperatures because Cu is a better conductor than Ni Resistivity of Ni will increase at all temperatures as Cu destroys the periodicity of Ni and acts as defects Residual resistivity of Ni at low temperature will increase as Cu atoms act as defect centres Resistivity of Ni remains the same Resistivity of Ni will decrease at all temperatures because Cu is a better conductor than Ni Resistivity of Ni will increase at all temperatures as Cu destroys the periodicity of Ni and acts as defects Residual resistivity of Ni at low temperature will increase as Cu atoms act as defect centres ANSWER DOWNLOAD EXAMIANS APP
Materials and Components The dielectric losses do not depend on frequency. False True False True ANSWER DOWNLOAD EXAMIANS APP
Materials and Components In solid insulator materials having only one kind of atom, the types of polarization which exist are Electronic, ionic and permanent Electronic and ionic Electronic only Electronic, ionic and permanent Electronic and ionic Electronic only ANSWER DOWNLOAD EXAMIANS APP
Materials and Components For making a capacitor it is better to have a dielectric having Permittivity which is neither high nor low Permittivity same as that of air High permittivity Low permittivity Permittivity which is neither high nor low Permittivity same as that of air High permittivity Low permittivity ANSWER DOWNLOAD EXAMIANS APP
Materials and Components In a metal, the valence electrons Are shared by all atoms Either B or C Are not shared Are shared only between neighbouring atoms Are shared by all atoms Either B or C Are not shared Are shared only between neighbouring atoms ANSWER DOWNLOAD EXAMIANS APP
Materials and Components Hall effect is observed in a specimen (metal or semi conductor) when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is In the same direction as current Normal to both current and magnetic field None of these In a direction anti parallel to magnetic field In the same direction as current Normal to both current and magnetic field None of these In a direction anti parallel to magnetic field ANSWER DOWNLOAD EXAMIANS APP
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