A positively charged metal sphere is connected to Earth by a wire. No other charged objects are nearby. Which movement makes the sphere neutral?
Protons move from the sphere into Earth.
Protons move from Earth into the sphere.
Electrons move from Earth into the sphere.
Electrons move from the sphere into Earth.
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.