An engineer is designing a prototype heating element using a metal wire. After conducting initial testing, she determines that the electrical resistance of the wire is too large.
To decrease the resistance of the wire and ensure it is lower on the next test, she should replace it with a 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.