An electric vehicle (EV) charging station is connected to the mains power supply using insulated copper cables. When the car is charging, the cables become very warm.
Which change would reduce the rate at which thermal energy is produced in these cables?
Use cables with a larger cross-sectional area.
Use longer cables of the same diameter.
Use cables with a smaller cross-sectional area.
Use cables with thicker external 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.