A rubber conveyor belt is used to transport dry grain up into a storage silo at an agricultural facility.
Explain how the moving conveyor belt becomes electrically charged.
Why does this charge remain on the belt rather than immediately flowing away?
Suggest why it is particularly dangerous for an electrical charge to accumulate in a grain-handling facility.
To prevent this, a conductive grounding brush is installed in contact with the belt. Explain how this brush prevents the belt from remaining charged.
31 exam-style questions on Edexcel IGCSE Physics Electric charge. Each one has a worked solution and a mark scheme showing where the marks go.