During a semiconductor manufacturing process, a cleanroom technician wipes a silicon wafer with a polyester cloth. This rubbing action causes the polyester cloth to become negatively charged.
Explain, in terms of the movement of subatomic particles, how the polyester cloth became 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.