2.25 explain some uses of electrostatic charges, eg in photocopiers and inkjet printers

2.25 explain some uses of electrostatic charges, eg in photocopiers and inkjet printers

Electrostatic charges can be used in electrostatic paint spraying, inkjet printers, photocopiers, electrostatic precipitators etc. In inject printers inks are given negative charges so they can drop exactly where the ink needs to be.

In photocopiers, the paper is shone in bright light which reflects to a rotating drum. The dark writings and pictures do not reflect. As a result the light removes the charges in the drum. Carbon powder attaches to the charges in the drum and the pictures and writings are pasted into a sheet of paper.