Certificate in Information Technology: Basic Electronics Notes

Institution: College

Course: Certificate in Information Technology

Posted By: Akalume

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Number of Pages: 115

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Electrical Quantities & Units
Potential refers to the possibility of doing work
Any charge has the potential to do the work of moving another charge, by either attraction or
repulsion. When we consider two unlike charge, they have a difference of, potential. The charge
has a certain amount of potential, corresponding to the amount of work this charge can do.
electromotive force, abbr. emf, difference in electric potential, or voltage, between the
terminals of a source of electricity, e.g., a battery from which no current is being drawn. When
current is drawn, the potential difference drops below the emf value. Electromotive force is
usually measured in volts
The unit of potential difference [electromotive force, abbr. emf] is volt named after Alessandro
Volta. The volt is the measure of work needed to move an electric charge.
One volt is the potential difference (voltage) between two points when one joule of energy is
used to move one coulomb of charge from one point to the other

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