Calculate the resistivity of the material of the wire 1.0m long,0.4mm

CBSE Class 12
1

calculate the resistivity of the material of the wire 1.0m long,0.4mm in diameter and having a resistance of 2.0 ohm.

2

R=(resistivity) ×length/area
Resistivity=RA/L
= Rπ r2/L
=1.256x10-3 Ohm-m