Two identical lamps, P and Q, are in a single closed loop with a battery. A student says that lamp Q will be dimmer than lamp P, because some of the current is used up in lamp P.
Give the current in lamp Q when the current in lamp P is 0.45 A.
Explain why the student's idea is wrong.
The battery is replaced by one with a larger potential difference. Describe the effect on the current in the two lamps.
82 exam-style questions on AQA GCSE Physics 2.1 Current, potential difference and resistance, covering 2.1.1 Standard circuit diagram symbols, 2.1.2 Electrical charge and current, 2.1.3 Current, resistance and potential difference, and 2.1.4 Resistors. Each one has a worked solution and a mark scheme showing where the marks go.