Expert Film: Jonathan Badgery uses a simple model to explain electrical resistance.

Discover how the physical properties of wires—such as length, thickness, and temperature—affect electrical resistance, influencing how easily current flows. Using simple models like balls in a stocking, the video illustrates why thinner, longer, and hotter wires offer more resistance, which is crucial for understanding circuit safety and design. Watch to see real-world implications, including how high resistance can cause wires to overheat and even catch fire.