Two metal spheres P and Q are on insulating supports. P is negative and Q is positive. Each sphere is separately connected to Earth, well away from the other sphere. Which statement describes the electron movements?
Electrons leave P and electrons leave Q.
Electrons leave P and electrons enter Q.
Electrons enter P and electrons enter Q.
Electrons enter P and electrons leave Q.
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.