#2.22P
identify common materials which are electrical conductors or insulators, including metals and plastics
#2.23P
practical: investigate how insulating materials can be charged by friction
#2.24P
explain how positive and negative electrostatic charges are produced on materials by the loss and gain of electrons
#2.25P
know that there are forces of attraction between unlike charges and forces of repulsion between like charges
#2.26P
explain electrostatic phenomena in terms of the movement of electrons
#2.27P
explain the potential dangers of electrostatic charges, e.g. when fuelling aircraft and tankers
#2.28P
explain some uses of electrostatic charges, e.g. in photocopiers and inkjet printers