A factory compares two sprayers using equal masses of paint and identical panels.
The table shows the results.
| Sprayer | Paint sprayed in g | Paint collected on panel in g |
|---|---|---|
| Uncharged droplets | 200 | 120 |
| Charged droplets | 200 | 170 |
Which gives the reduction in wasted paint and a reason for it?
30 g30\ \mathrm{g}30 g; charged droplets are attracted towards the panel.
50 g50\ \mathrm{g}50 g; charged droplets are repelled away from the panel.
50 g50\ \mathrm{g}50 g; charged droplets are attracted towards the panel.
30 g30\ \mathrm{g}30 g; charged droplets are repelled away from the panel.
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.