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, 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.