A student has two identical lamps and a 3.0 V battery.
She first connects the two lamps in series with the battery. She then connects the two lamps in parallel with the same battery.
In the series circuit, the potential difference across each lamp is 1.5 V.
Explain why.
State the potential difference across each lamp in the parallel circuit.
The lamps in the parallel circuit are brighter than the lamps in the series circuit.
Explain why.
The student unscrews one lamp in each circuit.
Describe what happens to the other lamp in each circuit.
42 exam-style questions on OCR GCSE Physics 3.2 Simple circuits, covering 3.2.1 Series and parallel circuits, 3.2.2 Circuit symbols and circuit diagrams, 3.2.3 Current, potential difference and resistance, 3.2.4 Ohm's law, 3.2.5 Ohmic and non-ohmic resistors, 3.2.6 Designing circuits to investigate resistance, 3.2.7 Linear and non-linear circuit components, 3.2.8 Current-potential difference graphs for components, 3.2.9 Resistance in series and parallel, 3.2.10 Series and parallel circuit problems, 3.2.11 Circuits for measurement and testing, 3.2.12 Power transfer in circuit devices, and 3.2.13 Energy and power in resistor circuits. Each one has a worked solution and a mark scheme showing where the marks go.