Introduction to Resistance and Electric Circuits

The video tutorial explains the concept of resistance by comparing it to water flow obstructed by rocks. It describes how resistance opposes electric charge flow and is measured in ohms. Materials like copper have low resistance, while rubber has high resistance. The video also illustrates how light bulbs and toasters use resistance to produce heat and light, with a focus on the filament in light bulbs acting as a resistor.

Explain how a light bulb operates based on the principle of resistance.

What role does the filament play in a light bulb?