A high-power electric vehicle (EV) charger is connected to the domestic electrical power supply using insulated copper cables. During charging, the cables become significantly warm.
Which of the following changes would reduce the thermal energy (heat) generated in the cables?
Use copper cables with a larger cross-sectional area.
Use copper cables with a smaller cross-sectional area.
Use cables with thicker plastic insulation.
Use longer copper cables of the same cross-sectional area.
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.