Basic d.c. circuit theory

Publisher Summary

This chapter presents the basic direct current (d.c.) circuit theory. There are several symbols that are used for the components in electrical circuit diagrams. All substances are made from elements and the smallest particle to which an element can be reduced is called an atom. An atom consists of electrons that can be considered to be orbiting around a central nucleus containing protons and neutrons. Conductors are materials having electrons that are loosely connected to the nucleus and can easily move through the material from one atom to another. Insulators are materials whose electrons are held firmlyto their nucleus. The flow of electric current is subject to friction. This friction, or opposition, ...

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