A student is given a filament lamp, a low-voltage power supply, a variable resistor, an ammeter, a voltmeter, a switch and some connecting leads.
Describe how the student could investigate how the current in the filament lamp changes with the potential difference across it.
Your answer should include the circuit the student should use and the results the student should expect.
81 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.