An engineer is designing a resistor using a length of metal wire. After testing her initial prototype, she finds that the electrical resistance of the wire is too large.
To be certain of obtaining a wire with a lower resistance using the same material, she should choose a piece of wire 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.