During the pneumatic transfer of combustible starch powder through an industrial delivery conduit, friction can lead to a significant build-up of electrostatic charge.
Describe how earthing is implemented in this setup and explain how it prevents a catastrophic dust explosion.
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.