A student rubs an acetate rod with a dry cloth. This process gives the acetate rod an overall positive charge.
Which of these sentences explains why the overall charge on the acetate rod is positive?
Negative charge has been removed from the rod.
Negative charge has been added to the rod.
Positive charge has been removed from the rod.
Positive charge has been added to the rod.
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.