A metal drum stands on dry rubber blocks. When a conducting cable connects the drum to Earth, electrons flow from the drum to Earth. Which statement identifies the electron transfer that charged the drum and its charge before the cable was connected?
The drum had lost electrons and was negatively charged.
The drum had gained electrons and was negatively charged.
The drum had lost electrons and was positively charged.
The drum had gained electrons and was positively charged.
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.