Resistance:

$\overline{){\mathbf{R}}{\mathbf{=}}\frac{\mathbf{\rho}\mathbf{L}}{\mathbf{A}}{\mathbf{=}}\frac{\mathbf{\rho}\mathbf{L}}{\mathbf{\pi}{\mathbf{r}}^{\mathbf{2}}}}$

ρ = R•πr^{2}/L

ρ_{1} = πR•(r^{2}/L)

The wires in (Figure 1) all have the same resistance; the length and radius of each wire are noted. Rank in order, from largest to smallest, the resistivities ρ1 to ρ5 of these wires.

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Resistors and Ohm's Law concept. You can view video lessons to learn Resistors and Ohm's Law. Or if you need more Resistors and Ohm's Law practice, you can also practice Resistors and Ohm's Law practice problems.