This question is about static electricity.
A student has a flat polythene strip balanced horizontally on a low-friction needle pivot.
The student wants to give the polythene strip a net negative electrostatic charge.
Describe a method the student could use to give the polythene strip a net negative electrostatic charge, specifying any materials required.
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.