Current Electricity

What is potential difference or voltage?

In a voltaic pile, today more commonly called a battery, chemical energy is converted into increased energy of electric charges. Positive charges at the positive terminal of the battery have a greater energy than those at the negative terminal. The quantity that is important is not the total energy difference of charges at the two terminals of the battery, but the energy difference divided by the charge. This quantity is called the electric potential difference, or more commonly, the voltage.


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