Hello
Formula for resistivity (p) is:
p = (R×A)/l
where R = resistance of the material
A = cross sectional area ( pi × r^2 )
l = length of the wire
so, p = ( 100 × (22/7) × 0.1 × 0.1) / 1
= 22/7 or 3.14 ohm-m
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