A positively charged acetate strip is held near an uncharged fragment of aluminium foil. The foil moves towards the strip even though they do not touch.
What happens in the foil to cause this movement?
Electrons in the foil shift towards the strip, making the near side negative.
Protons in the foil shift away from the strip, making the near side negative.
Electrons in the foil shift away from the strip, making the near side positive.
Electrons pass from the foil into the strip, making the whole foil positive.
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.