. ORIGIN OF ELECTRICITY
About 300 b.c the Greeks knew that particles of wheat were attracted to amber necklaces. They called this effect 'electricity ' after the word 'electron' which meant amber. Subsequently, many substances were found to possess the ability to attract light particles once they had been rubbed, and the particles were then said to be electrified or charged, or to have a charge. Today you can see easily see this power of attraction if you rub aplastic biro or pen holder , or a rubber ballon, vigorously on the sleeve of your jacket, and bring it near to small pieces of paper . The paper is immediately attracted toward the plastic pen or rubber balloon. Look at the image of the post office tower,London. The lighting conductor at the top is arrowed 
A lighting storm over New York City, showing the Empire State Building lighting is due to the sudden discharge of very big static charges which are built up in clouds. The 'flash' is due to the ionization of particles in the air through which the discharge passes. Look the image or the lighting strom over New York City
