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Electrical Fundamentals – Capacitors and Capacitance

A. Bhatia, B.E.

Consider two plates connected in a circuit across a voltage source. If we fill the space between the plates with a conductor (water, acid, etc.) and close the circuit, we get a current dictated by Ohms law, I= V/R (where V is voltage, and R is the resistance between the plates). If the space is a non-conductor, no current will flow but the voltage will exist across the plates causing electrical charge or an electrical field between the plates. Capacitance is the property of an electric conductor that characterizes its ability to store an electric charge between two conducting plates. Larger the plates, the more charges will exist and the closer the plates, the stronger will be the electrical attraction between the plates.

This 4-hr course provides a basic overview of capacitance theory and is based entirely on Naval Education and Training Materials (NAVEDTRA 14174), Electricity and Electronic Training Series; Module-2, Chapter 3, titled “Capacitance”.

The course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of course materials.

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