During a laser-printer test, a charged image pattern is produced on the drum. The toner should have the opposite charge to this pattern, but a fault gives the toner the same sign of charge. A technician examines the drum before the paper passes over it.
Which conclusion is most appropriate?
More toner is likely to stay on the charged pattern because the matching charges attract.
Toner is likely to coat the whole drum because matching charges exert no force.
Less toner is likely to stay on the charged pattern because the matching charges repel.
The same toner pattern is likely to form because the laser places each toner particle.
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.