To calibrate an electrostatic field mill sensor, a laboratory technician needs to generate a net static electric charge on a handheld polytetrafluoroethylene (PTFE) block.
Describe one practical method the technician can use to give the PTFE block an overall electric charge.
47 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.