During a laboratory maintenance procedure, a technician vigorously rubs a synthetic acrylic safety barrier with a dry polyester cleaning cloth. Explain, in terms of the behaviour of subatomic particles, how the acrylic barrier becomes electrostatically charged during this process.
47 exam-style questions on Edexcel GCSE Physics 11.1 Charging by friction. Each one has a worked solution and a mark scheme showing where the marks go.