An insecticide sprayer gives all droplets negative charge. The droplets approach a positively charged target.
The signs of both the droplet charge and target charge are reversed, with their magnitudes unchanged.
Which describes the electrostatic effects after the change?
Droplets now attract one another and still attract the target.
Droplets still repel one another and still attract the target.
Droplets still repel one another and now repel the target.
Droplets now attract one another and now repel the target.
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.