A student is building a circuit and uses a cylindrical metal wire as a resistor. She finds that the resistance of this wire is too large for her application.
To be certain of making a resistor with a lower electrical resistance, she should replace it with a wire 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.