A negatively charged cloud induces a positive charge at the ground surface below it. A lightning discharge then transfers electrons from the cloud to the ground. Which statement describes the ground electrons before the discharge and the cloud charge during the discharge?
Ground electrons move away from the surface; the cloud becomes less negative.
Ground electrons move towards the surface; the cloud becomes more negative.
Ground electrons move away from the surface; the cloud becomes more negative.
Ground electrons move towards the surface; the cloud becomes less negative.
91 exam-style questions on Edexcel GCSE Physics 11.1 Charging by friction, covering 11.1.1 Charging insulators by friction, 11.1.2 Forces between charges, 11.1.3 Electrostatic phenomena, and 11.1.4 Earthing and removing charge. Each one has a worked solution and a mark scheme showing where the marks go.