Uses of static electricity
2 marks · EasyIn electrostatic paint spraying, why is it useful for the paint to be attracted into ‘hard to reach’ corners and edges?
How does electrostatic charge make this possible?
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(a) It ensures even coverage, protecting all parts of the surface.
(b) Because opposite charges attract, the paint is pulled into corners and edges by electrical attraction.
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Marking points
B1 (a) · 1 mark · States that attraction ensures all areas/corners receive paint or have even coverage.
B2 (b) · 1 mark · States that electrostatic attraction draws charged paint into these areas.
Worked solution
a) It gives even coverage and ensures all parts are painted and protected. b) The oppositely charged object attracts the paint, so even awkward places get coated.