Consider four conducting materials copper, tungsten, mercury and aluminium with resistivity ρC,ρT,ρM and ρA respectively. Then

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ρC>ρA>ρT

ρA>ρM>ρC

ρM>ρA>ρC

ρA>ρT>ρC

answer is C.

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Detailed Solution

data memory based questionρC=1.68×10−8Ωm, ρT=5.6×10−8Ωm,ρM=98×10−8Ωm and ρA=2.65×10−8ΩmHence, ρM>ρA>ρC

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