A person walks across a nylon carpet and becomes negatively charged.
As the person's hand moves towards a metal door handle, a small spark jumps across the air gap just before the hand touches the handle.
Explain why the spark jumps across the air gap.
Use the idea of an electric field in your answer.
A spark jumps across a larger gap when the person has more charge.
Explain why.
The person is wearing shoes with rubber soles.
Explain why the rubber soles allow charge to build up on the person.
80 exam-style questions on Edexcel GCSE Physics 11.2 Uses, dangers and electric fields, covering 11.2.1 Uses of electrostatic charge, 11.2.2 Dangers of sparking, 11.2.3 Electric fields, and 11.2.4 Electric fields and static electricity. Each one has a worked solution and a mark scheme showing where the marks go.