Question

What is the resistance of a 1.3 m copper wire ( = 1.7 10-8 m) that has a cross-sectional area of 8.36 10-6 m2?

Answer 1

Answer:2.6x10^-3

Step-by-step explanation:

Answer 2

The resistance of a piece of wire is given by

`R= (\rho L)/(A)`
where

`\rho` is the material resistivity
L is the length of the wire
A is its cross-sectional area

Substituting the data given by the problem, we can find the value of the resistance of the wire:

`R= (\rho L)/(A)= ((1.7 \cdot 10^(-8) m)(1.3 m))/((8.36 \cdot 10^(-6) m^2))=2.6 \cdot 10^(-3)\Omega`