An engineer designs a heating element using a uniform metal wire. They find that the resistance of the wire is too high. To decrease the resistance, they should replace the wire with another piece of wire made of the same material that is:
longer and thicker.
longer and thinner.
shorter and thicker.
shorter and thinner.
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.