# Ratio of Diameter of Wires#

## Part 1#

Find the ratio of the diameter of aluminum to copper wire, if they have the same resistance per unit length (as they might in household wiring).

• $$\sqrt{\rho_\mathrm{Cu} / \rho_\mathrm{Al}}$$

• $$\sqrt{\rho_\mathrm{Al} / \rho_\mathrm{Cu}}$$

• $$\rho_\mathrm{Cu} / \rho_\mathrm{Al}$$

• $$\rho_\mathrm{Al} / \rho_\mathrm{Cu}$$

• $$\rho_\mathrm{Cu} * \rho_\mathrm{Al}$$

• $$(\rho_\mathrm{Cu} / \rho_\mathrm{Al})^2$$