An electric heater is connected to the mains supply by insulated copper wires. The circuit is protected by a fuse, but the connecting wires become hot.
How could the wires be prevented from becoming so hot?
Connect a second fuse in the neutral wire.
Use a fuse with a higher current rating.
Use connecting wires with a larger cross-sectional area.
Use thicker plastic insulation on the existing connecting wires.
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.