'Electricity' is the term the early scientists used when they were actually referring to 'charge'. Present usage of the term 'electricity' has become confused. In addition to its definition by physicists, the word electricity has several popular definitions which are contradictory. Many sources say that "electricity" is the quantity of electrical energy measured in joules or kilowatt-hours. Other sources call the motion of charges within a conductor by the name electricity, and they measure the quantity of electricity in terms of amperes. Still others call a wide variety of electrical phenomena by the name electricity, e.g., bioelectricity, piezoelectricity, triboelectricity, etc. It is advisable to be extremely careful when interpreting texts which employ the frequently misused term "electricity" in place of the more precise terms electric charge, electric current, electrical energy, etc. Source : Wikipedia, the free encyclopedia. http://en.wikipedia.org/wiki/Electricity |
