An electrostatic precipitator gives smoke particles a negative charge and attracts them to positive collecting plates. In a trial, the charging unit fails, so the particles remain neutral. The plate voltage and airflow stay the same.
Which conclusion is most appropriate?
Electrical collection is likely to decrease; the particles no longer carry the intended charge.
Electrical collection is likely to increase; the particles no longer carry the intended charge.
Electrical collection must remain unchanged; plate charge alone guarantees the same collection.
Electrical collection must cease completely; neutral particles can never experience attraction.
80 exam-style questions on Edexcel GCSE Physics 11.2 Uses, dangers and electric fields, covering 11.2.1 Uses of electrostatic charge, 11.2.2 Dangers of sparking, 11.2.3 Electric fields, and 11.2.4 Electric fields and static electricity. Each one has a worked solution and a mark scheme showing where the marks go.