A light-sensing circuit contains a battery, a closed switch, a fuse, an LDR and a variable resistor connected in one closed loop. The LDR is in dim light. Ammeter X is between the battery and the fuse. Ammeter Y is between the LDR and the variable resistor.
What should the two ammeters show?
Ammeter X shows a larger current, because the components reduce the current before it reaches ammeter Y.
Ammeter X and ammeter Y show the same current, because charge is not used up in the components.
Ammeter X shows a current but ammeter Y shows none, because the LDR has high resistance in dim light.
Ammeter Y shows a larger current, because the variable resistor increases the flow of charge.
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.