Materials and Components If a small amount of Cu is added to Ni conductor, then Resistivity of Ni will decrease at all temperatures because Cu is a better conductor than Ni Resistivity of Ni remains the same Residual resistivity of Ni at low temperature will increase as Cu atoms act as defect centres Resistivity of Ni will increase at all temperatures as Cu destroys the periodicity of Ni and acts as defects Resistivity of Ni will decrease at all temperatures because Cu is a better conductor than Ni Resistivity of Ni remains the same Residual resistivity of Ni at low temperature will increase as Cu atoms act as defect centres Resistivity of Ni will increase at all temperatures as Cu destroys the periodicity of Ni and acts as defects ANSWER DOWNLOAD EXAMIANS APP
Materials and Components The rule that resistivity of conductors can be separated into two parts viz. temperature independent and temperature dependent is known as Matthiessen’s rule Onne’s rule Curie rule Debye rule Matthiessen’s rule Onne’s rule Curie rule Debye rule ANSWER DOWNLOAD EXAMIANS APP
Materials and Components The elements which become superconducting at extremely low temperatures are Relatively poor conductors at room temperature Good conductors at room temperature Ferromagnetic at room temperature Insulators at room temperature Relatively poor conductors at room temperature Good conductors at room temperature Ferromagnetic at room temperature Insulators at room temperature 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 When a dielectric material is subjected to alternating field, the absorption of energy by the material from the field is given by the imaginary part of polarizability. True False True False ANSWER DOWNLOAD EXAMIANS APP
Materials and Components At room temperature the number of conducting electrons in an intrinsic semiconductor Is almost equal to the number of valence electrons Is small as compared to the number of valence electrons Is a very small fraction of the number of valence electrons Is about half the number of valence electrons Is almost equal to the number of valence electrons Is small as compared to the number of valence electrons Is a very small fraction of the number of valence electrons Is about half the number of valence electrons ANSWER DOWNLOAD EXAMIANS APP
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