basics of electricity

Posted on Feb 5, 2014

The study of electricity revolves around a few common terms that describe the behavior of electrical charge. Electrical charge and its associated phenomena are a fundamental part of the world that we live in. The understanding and use of electricity is largely responsible for the advanced technology that we enjoy today: electric light, heat, digit

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al computers, television, music on CD, DVD video, radar, microwave ovens, cell phones, and on and on and on. The first recorded studies of natural attractive phenomena occurred among the ancient Greeks over 2, 500 years ago. That`s right, over 2 thousand 5 hundred years ago. Over the last 2 or 3 hundred years, and particularly in the last century, that understanding has grown tremendously. In fact, some of the most interesting work relative to this limited discussion was done over a 40-year span between 1785 and 1826. The fundamental unit of electric charge is the COULOMB, named for Charles Augustin de Coulomb, a French physicist (1736-1806). The smallest concentration of charge is contained in a single electron, a subatomic particle. The Coulomb is an extremely large amount of charge, or stated more precisely, an electric charge equal to 1 Coulomb requires an extremely large number of electrons. The charge of a single electron is 0. 00000000000000000016 Coulombs. That`s 18 zeros in front of the 16. Stated in the notation that scientists prefer, called coincidentally, scientific notation, that amount of charge would be 1. 6 x 10-19 Coulombs. So 1 Coulomb of electric charge represents 6. 25 x 1018 electrons or 6, 250, 000, 000, 000, 000, 000 electrons. That`s a whole bunch of electrons (6. 25 billion billion or if you prefer 6. 25 million trillion). In fact, if each electron was a large as a marble, with a ½ inch diameter,...

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