A metal storage tank stands on insulating supports and has become negatively charged.
A maintenance worker holds the bare end of a copper cable whose other end is connected to earth. When the worker places their other hand on the tank, they feel a small electric shock.
Explain why the worker feels an electric shock.
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.