Question

Awire is 1m long, 0.2mm in diameter and has resistance of 100. Calculate its resistivity.

Answer 1

R=∫L/A

R=resistance

∫=resistivity

L=length

A=cross sectional area

∫=(RA)/L

∫=(100×0.2×10^-3)/1

∫=0.02 ohm.meters