A high-power electric vehicle charging station is connected to the power grid using copper cables. During charging, these cables become warm due to electrical heating. Which of the following modifications to the cables would most effectively reduce the amount of heat generated within them?
Use cables with a larger cross-sectional area.
Use longer cables of the same thickness.
Use cables with a smaller cross-sectional area.
Use thicker plastic insulation around the cables.
132 exam-style questions on CIE IGCSE Physics 4.2.4a Resistance. Each one has a worked solution and a mark scheme showing where the marks go.