A student investigates a series circuit containing identical resistors connected to a 12 V battery. The student records the total resistance for two and three resistors.
| Number of resistors | Total resistance |
|---|---|
| 2 | 8.0 Ω |
| 3 | 12.0 Ω |
The student then adds a fourth identical resistor without changing the battery.
Calculate the current when four resistors are connected. Explain how adding the fourth resistor affects the current compared with three resistors.
94 exam-style questions on AQA GCSE Physics 2.2 Series and parallel circuits, covering 2.2 Series and parallel circuits. Each one has a worked solution and a mark scheme showing where the marks go.