A resistor in a model railway controller is held at constant temperature. When the potential difference across it is 2.4 V, the current through it is 0.16 A. The potential difference is then increased to 6.0 V.
What current is expected through the resistor?
0.24 A0.24\ \mathrm{A}0.24 A
0.40 A0.40\ \mathrm{A}0.40 A
0.16 A0.16\ \mathrm{A}0.16 A
0.064 A0.064\ \mathrm{A}0.064 A
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.