Determination of r for a Metallic Conductor Aim: To determine the resistivity (r) of a given sample of wire Introduction: Physical factors that affect the resistance of a conductor are length, cross sectional area and a constant that depends upon the material called the resistivity. The resistance per unit length is the same all along a uniform wire so if the resistance of different lengths of a wire is found out, the resistivity can be …showed first 75 words of 767 total…

…showed last 75 words of 767 total…n some parts and this made the reading inaccurate. This can also be avoided by using a straight wire and taking measurements from different parts of the wire. - In addition, the wire was not connected properly to the circuit since the crocodile clips touched only some parts of the wire. There should be better contacts to the wire; the wire should be surrounded completely. Soldering the contacts to the wire will minimize this uncertainty.