If the resistivity of an alloy is ρ′ and that of constituent metal is ρ then :
A
ρ′>ρ
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B
ρ′<ρ
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C
ρ′=ρ
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D
there is no simple reaction between ρ′&ρ
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Solution
The correct option is Aρ′>ρ Usually alloys have higher resistivity then pure metals. The different atoms in the alloy cause the electrons to have more interruptions and scattering in their otherwise smooth flow.