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. Each one has a worked solution and a mark scheme showing where the marks go.