A student designs an experimental setup to investigate how the electrical resistance of a negative temperature coefficient (NTC) thermistor varies with temperature. They construct a circuit consisting of a variable DC voltage source, an ammeter, a voltmeter, a switch, and connecting leads, with the NTC thermistor placed inside a beaker of water on a heatproof mat.
State the name of one additional piece of measuring apparatus the student would require to successfully carry out this investigation.
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.