Which experiment presented the strongest evidence that the resistance of a metal wire increases with temperature?

The experiment that provides the strongest evidence that the resistance of a metal wire increases with temperature typically involves systematic measurement of resistance at various temperatures while keeping other variables constant.

In this context, the correct choice indicates that the methodology used in Experiment 3 likely included varying the temperature of a metal wire and accurately measuring its resistance at different points. This type of experiment would typically involve heating the wire and using precise instruments to measure both the temperature and the corresponding resistance.

A clear trend illustrating an increase in resistance with temperature would support the theoretical understanding that as temperature rises, the atoms in the metal vibrate more vigorously. This increased atomic motion leads to more frequent collisions of electrons as they flow through the material, resulting in greater resistance.

If the observations from Experiment 3 showed a linear or consistent increase in resistance corresponding to an increase in temperature, this would provide robust evidence supporting the concept. The experimental setup should also minimize other potential influences on resistance, allowing for a clear focus on the relationship between temperature and resistance. Such controls strengthen the reliability of the experiment's findings.