A student investigates identical resistors in parallel across a 6.0 V supply. The table shows the results.
| Number of resistors | Total current / A\mathrm{A}A |
|---|---|
| 1 | 0.12 |
| 2 | 0.24 |
| 3 | 0.36 |
A fourth identical resistor is connected in parallel. What is the total resistance of the four-resistor combination?
50 Ω50\ \Omega50 Ω
16.7 Ω16.7\ \Omega16.7 Ω
12.5 Ω12.5\ \Omega12.5 Ω
200 Ω200\ \Omega200 Ω
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.