A student rubs a polythene rod with a dry woollen cloth, which causes the polythene rod to gain a net negative electric charge.
Explain, in terms of the transfer of charged particles, how rubbing the polythene rod with the woollen cloth gives the rod a negative charge.
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.