Electricity is one of the valuable gifts of science. To-day, we use electricity for many purposes. If the supply of electricity stops for a short time, we are put to great difficult and incandescent lamp was invented by the America scientist Edison in 1878. Nowadays, we have florescent lamps, too.
There are two kinds of electricity, static and current. Static electricity cannot be transferred from one object to another, or from one place to another. Current electricity can be transferred by means of wire.
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