Materials and Components If the number of atoms per unit volume of a monoatomic gas changes, the dielectric constant still remains constant. False True False True ANSWER DOWNLOAD EXAMIANS APP
Materials and Components The elements which become superconducting at extremely low temperatures are Insulators at room temperature Good conductors at room temperature Ferromagnetic at room temperature Relatively poor conductors at room temperature Insulators at room temperature Good conductors at room temperature Ferromagnetic at room temperature Relatively poor conductors at room temperature ANSWER DOWNLOAD EXAMIANS APP
Materials and Components The residual resistivity of a binary alloy at 0 K is Dependent on the concentration of minor component in the alloy Difference of residual resistivities of component metals Sum of residual resistivities of component metals Product of residual resistivities of component metals Dependent on the concentration of minor component in the alloy Difference of residual resistivities of component metals Sum of residual resistivities of component metals Product of residual resistivities of component metals ANSWER DOWNLOAD EXAMIANS APP
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 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 remains the same Resistivity of Ni will decrease at all temperatures because Cu is a better conductor than Ni 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 In a metal, the valence electrons Are not shared Either B or C Are shared only between neighbouring atoms Are shared by all atoms Are not shared Either B or C Are shared only between neighbouring atoms Are shared by all atoms ANSWER DOWNLOAD EXAMIANS APP
Materials and Components Electrical contact materials used in switches, brushes, relay must possess High thermal conductivity and high melting point High thermal conductivity and low melting point Low thermal conductivity and high melting point Low thermal conductivity and low melting pointL High thermal conductivity and high melting point High thermal conductivity and low melting point Low thermal conductivity and high melting point Low thermal conductivity and low melting pointL ANSWER DOWNLOAD EXAMIANS APP
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