How to Carry Out an Experiment to Investigate the Relationship Between Resistance and Wire Length

The video tutorial covers a physics experiment on measuring the resistance of a microwire as its length changes. It begins with an overview of the required equipment and circuit setup, followed by a discussion on the independent and dependent variables, as well as the controls needed to ensure a fair test. The procedure for conducting the experiment is detailed, including safety precautions. Finally, the video explains how to analyze the data using a scatter graph and draw conclusions about the proportionality between wire length and resistance.

What does a straight line graph through the origin indicate about the relationship between resistance and length of wire?

How can you determine the resistance per unit length of the wire from the graph?