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Materials and Components

Q1: 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

ANS:C - resistivity of Ni will increase at all temperatures as Cu destroys the periodicity of Ni and acts as defects

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