A negatively charged balloon is held close to an uncharged wall. Which change in the wall explains the attraction?
Electrons shift slightly towards the balloon.
Electrons shift slightly away from the balloon.
Protons leave their nuclei away from the balloon.
Protons leave their nuclei towards the balloon.
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.