Posterous theme by Cory Watilo

2.20 answers

2.20 answers

30 November 2010

14:43

·         2.20 identify common materials which are electrical conductors or insulators, including metals and plastics

Insulators

Conductors

Air

Metal

Plastic (used to encase electric wires)

Copper (used in wires)

Rubber (used to encase older plugs)

Brass (used in pins on plugs)

paper

Water (don't use your hair drier in the bath!)

Dry wood

Wet wood