In an industrial manufacturing plant, a flat PVC (polyvinyl chloride) sheet is polished by a dry woollen buffing wheel. After this process, the PVC sheet is found to have acquired a significant negative electrostatic charge.
Explain, in terms of subatomic particles, how the PVC sheet becomes negatively charged.
47 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.