Question 6
FThe Figure shows a car door panel being painted with an electrostatic paint sprayer.
Figure
a.[2]
Explain why the paint droplets spread out into a wide cloud after leaving the nozzle.
b.[2]
The nozzle of the spray gun is pointed only at the front of the panel.
Explain why the edges and the back of the panel are also painted.
c.
[3]
A factory compares the volume of paint used per car with an uncharged spray and with the electrostatic spray.
The Table shows the results.
Table
| Type of spray | Volume of paint used per car in litres |
|---|---|
| uncharged spray | 4.0 |
| electrostatic spray | 2.6 |
Calculate the percentage reduction in the volume of paint used per car when the electrostatic spray is used.
d.[2]
The factory paints 1200 cars each week.
Calculate the volume of paint saved each week by using the electrostatic spray.
11.2 Uses, dangers and electric fields Questions
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.