Problems with static electricity
2 marks · EasyDescribe what happens to charged dust particles as they pass through an electrostatic precipitator.
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They are attracted to and stick to large earthed metal plates inside the precipitator.
Also accept: The charged dust particles move towards and collect on the earthed plates.
Common mistakes: Just saying 'removed' without mentioning attraction to plates.
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Marking points
B1 · 1 mark · States dust/ash becomes charged.
B2 · 1 mark · States charged dust is attracted to and collects on earthed plates.
Worked solution
Charged dust particles are attracted towards the earthed metal plates and stick to them, removing them from the smoke.