A conducting foil vane hangs from an insulating thread. The vane and a plastic film are both positively charged. The film is brought close to the vane without touching it. The film is then moved away while the vane is connected to Earth until it is neutral. The film is brought close to the vane again. Which statement describes the movement of the vane during the two tests?
The vane first swings towards the film and later swings away from it.
The vane first swings towards the film and later remains still.
The vane first swings away from the film and later remains still.
The vane first swings away from the film and later swings towards it.
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.