Materials and Components
The rule that resistivity of conductors can be separated into two parts viz. temperature independent and temperature dependent is known as

Onne’s rule
Matthiessen’s rule
Debye rule
Curie rule

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Materials and Components
The residual resistivity of a binary alloy at 0 K is

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

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Materials and Components
At room temperature the number of conducting electrons in an intrinsic semiconductor

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

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