A metal radiator grille is painted from a fixed nozzle position. The grille is earthed.
The technician compares two settings.
| setting | charge on each paint droplet | surfaces coated |
|---|---|---|
| U | uncharged | only the faces of the bars nearest the nozzle |
| C | negative | the fronts, sides and backs of the bars |
Explain how the motion of the droplets produces the different coating patterns for settings U and C.
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.