A student peels a plastic protective film off the glass screen of a new smartphone. As the plastic film is separated from the glass, both materials become electrically charged.
Explain how the plastic film and the glass screen become charged during this process.
When the student releases the partially peeled plastic film, it moves back and clings to the glass screen. Explain why the film moves back towards the screen.
31 exam-style questions on Edexcel IGCSE Physics Electric charge. Each one has a worked solution and a mark scheme showing where the marks go.