Experiment on Relationship between Resistance of a Constantan Wire and its Length

It is very important to find out if your ammeter, voltmeter, batteries, rheostat, and connecting wires are in good working condition. In this video, I will show you a simple way to set up an experiment to determine the relationship between resistance of a constantan wire and its length. What is the hypothesis? The longer the constantan wire, the higher the resistance. Can you prove it? Let's find out.