Electrical resistance

The video explains resistance in electrical circuits, measured in ohms, and how it varies with different materials. It highlights that higher resistance makes it harder for current to flow. Resistance increases with the length of a wire and decreases with its thickness, which is why overhead power cables are thick to reduce resistance and facilitate current flow over long distances.

Explain how resistance affects the flow of current in a circuit.

What happens to the resistance when the thickness of a wire increases?

• Increases

• Decreases

• Remains the same

• Varies with temperature