Look up tabulated conductivities (or resistivities) of copper, silver, and aluminum at 20 degrees C and calculate the resistance of a copper wire that is 5 meters long with a 0.25 mm diameter. Repeat your calculation for silver, and for aluminum. The density of free electrons is 8.5*10^28 particles/m^3 for copper, 5.86*10^28m^-3 for silver, and 18.1*10^28 m^-3 for aluminum. For a potential di§erence of 12 volts, how do the electron drift velocities in each of the three wires compare with one another?

Look up tabulated conductivities (or resistivities) of copper, silver, and aluminum at 20 degrees C and calculate the resistance of a copper wire that is 5 meters long with a 0.25 mm diameter. Repeat your calculation for silver, and for aluminum. The density of free electrons is 8.510^28 particles/m^3 for copper, 5.8610^28m^-3 for silver, and 18.1*10^28 m^-3 for aluminum. For a potential di§erence of 12 volts, how do the electron drift velocities in each of the three wires compare with one another?

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