An engineer wants to investigate the electrical properties of a uniform conductive carbon-coated paper strip of total length 50 cm. They are provided with a variable DC power supply, a switch, an ammeter, a voltmeter, and connecting leads with sliding contact probes.
Draw a circuit diagram of the experimental setup the engineer should use to determine the resistance of a specific 20 cm section of the conductive strip.
Your circuit diagram must use standard electrical symbols for all components.
59 exam-style questions on Edexcel GCSE Physics 10.2 Resistance, covering 10.2.1 Current in a circuit and conservation at junctions, 10.2.2 Resistance and variable resistors, 10.2.3 Series and parallel resistance, 10.2.4 I–V characteristics of components, and 10.2.5 LDRs and thermistors. Each one has a worked solution and a mark scheme showing where the marks go.