During a thunderstorm, charge builds up at the bottom of a cloud. A spark then passes between the cloud and the ground. Which statement describes the spark?
Protons move from the ground upwards towards the charged cloud
Charge moves through the air because the field is very strong
The cloud and the ground swap equal amounts of contact force
The air between the cloud and the ground becomes an insulator
40 exam-style questions on AQA GCSE Physics 2.5 Static electricity, covering 2.5.1 Static charge and 2.5.2 Electric fields. Each one has a worked solution and a mark scheme showing where the marks go.