Inside a camera's light meter, a battery of constant potential difference drives a current through an LDR and a fixed resistor, which are in series. A voltmeter is connected across the fixed resistor. When the photographer turns the camera towards a different scene, the reading on the voltmeter goes up. What explains this?
The new scene is brighter, so the LDR's resistance is lower and the current is larger
The new scene is darker, so the LDR's resistance is higher and the current is smaller
The new scene is brighter, so the LDR's resistance is higher and the current is smaller
The new scene is darker, so the LDR's resistance is lower and the current is larger
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.