An electric shower is connected to the home electrical supply using insulated copper cables. The installer notices that the cables become excessively warm when the shower is in use.
Which of the following changes would reduce the rate of heat production in the cables?
Use thicker copper cables.
Use thinner copper cables.
Use longer copper cables.
Use a material with higher resistivity for 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.