Question

If the resistivity of wire having a length of 200 mm and uniform cross 3 sectional area of 0.5 mm2 is 200 μΩ-cm then calculate its resistance.

Answer 1

Answer:

R = p(L/A) Ohms

Where:

R= Resistance in Ohms

p(rho) = Resistivity in (Ohm meters)

L = Conductor length in meters (m)

A = Conductor cross sectional area in meters squared (m^2)

So we have:

R = (50×10^-18 Ohm m) × 100m/(0.1mm^2 × (1m/1000mm)^2)

R = 5×10^-7 Ohms

This number seems way off, as in way too low! Please double check your Resistivity. I believe it is not correct and is too low by several orders of magnitude.