During a practical investigation, a student adds a resistor in series to a circuit powered by a 12 V supply. The supply potential difference does not change. The student measures the current before and after adding the resistor.
| Measurement | Current |
|---|---|
| Before the resistor is added | 1.5 A |
| After the resistor is added | 0.75 A |
Calculate the resistance of the added resistor.
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.