If a small amount of Cu is added to Ni conductor, then
A. Resistivity of Ni will decrease at all temperatures because Cu is a better conductor than Ni
B. Residual resistivity of Ni at low temperature will increase as Cu atoms act as defect centres
C. Resistivity of Ni will increase at all temperatures as Cu destroys the periodicity of Ni and acts as defects
D. Resistivity of Ni remains the same
Answer: Option C
This Question Belongs to Electronics And Communications Engineering >> Materials And Components
For making a capacitor it is better to have a dielectric having
A. High permittivity
B. Low permittivity
C. Permittivity same as that of air
D. Permittivity which is neither high nor low
As the viscosity of a liquid increases, the relaxation time
A. Remains constant
B. Increases
C. Decreases
D. First decreases then increases
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