A student rubs one end of a dry plastic rod with a cloth. The rubbed end becomes charged and remains charged after the cloth is removed. Which explanation accounts for both observations?
Protons transfer between the surfaces and cannot move freely through the plastic.
Protons transfer between the surfaces and can move freely through the plastic.
Electrons transfer between the surfaces and can move freely through the plastic.
Electrons transfer between the surfaces and cannot move freely through the plastic.
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.