An industrial painting facility uses an electrostatic paint sprayer to coat car panels.
The sprayer gives a positive electric charge to each paint droplet as it leaves the nozzle.
The droplets of paint acquire a positive charge because the sprayer:
adds protons to the droplets
adds electrons to the droplets
removes protons from the droplets
removes electrons from the droplets
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.