A length of metal wire is connected to a fixed voltage supply in a closed circuit. Which change to the wire results in a decrease in the current in the circuit?
decreasing the length of the wire
increasing the cross-sectional area of the wire
connecting a second identical length of wire in series with the original wire
connecting a second identical length of wire in parallel with the original wire
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.