A high-power electric vehicle charger is connected to the mains power supply using insulated copper wires. During charging, the wires become noticeably warm.
What modification to the connecting wires would reduce the rate at which thermal energy is generated in them?
Use copper wires with a larger cross-sectional area.
Use copper wires with a smaller cross-sectional area.
Use copper wires with a longer length.
Use wires with thicker outer insulation.
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.