My daughter is doing a science experiment on which metal (e.g., copper, silver, aluminum, iron) has maximum electric conductivity. We are assuming we can accomplish this by using different metal, 3 to 6 volt electrical circuits, and a basic digital multimeter.
How we can do it? Do we have to measure resistance of this metal? Or is there a different way. Please guide us.
Best Answer
Conductivity is given by $$ \sigma=\frac{l}{AR} $$ where where $l$ is length, $A$ is cross sectional area and $R$ is resistance.
Therefore if you can measure these three things for each metal you can calculate their conductivities.