A wire is 1.0m long 0.2mm in diameter and has a resistance of 10Ω. Calculate the resistivity of its material

CBSE Class 10 CBSE Class 10 Science
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1

A wire is 1.0m long 0.2mm in diameter and has a resistance of 10Ω. Calculate the resistivity of its material.

2

We have,
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d = Diameter of the wire = 0.2mm = 2 × 10-4 m
l = Length of the wire = 1 m
r = 10Ω
p = Resistivity of the wire.

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Therefore, the resistivity of the material is 3.14 × 10-7 Ωm.