A student has two polythene rods, an acetate rod, some dusters and a length of thread.
Polythene becomes negatively charged when it is rubbed with a duster.
Acetate becomes positively charged when it is rubbed with a duster.
Describe how the student could use this equipment to show that like charges repel and unlike charges attract.
Your answer should explain the results in terms of electrons.
91 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.