Figure 1 shows an industrial film-processing line where a polymer roller has become highly positively charged due to friction. The roller is positioned a short distance above a flat, earthed metal safety guard.
Explain how an electrostatic spark can be produced between the positively charged roller and the earthed safety guard. Your answer must refer to induced charges.
Charging by friction and electrostatic phenomena Questions
Practise Edexcel GCSE Physics Charging by friction and electrostatic phenomena with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Physics (1PH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.