Posted by Ritu on May 17, 2014, 12:57 p.m.
The word electricity comes from the greek word elektron which means amber.Amber is petrified tree resin ;and the ancients knew that if you rub a piece of amber with a cloth , the amber attracts small pieces of paper , leaves , dust etc....A piece of hard rubbber , a glass rod or a plastic ruler rubbed with a cloth will also display this amber effect or static electricity.
substances which have the property of attracting light objects are said to be electrified.electrification by friction is sometimes associated with a crackling sound.this may be heard when dry hair is combed with vulcanite comb.
The crackling sound is produced by a small electric sparks.