A circuit is a closed loop that allows charge to move from one place to another. So, when we talk about these values, we're really describing the movement of charge, and thus, the behavior of electrons. Resistance is a material's tendency to resist the flow of charge (current).Current is the rate at which charge is flowing.Voltage is the difference in charge between two points.The three basic principles for this tutorial can be explained using electrons, or more specifically, the charge they create: They all operate using the same basic power source: the movement of electrons. Your lightbulb, your stereo, your phone, etc., are all harnessing the movement of the electrons in order to do work. Electrons create charge, which we can harness to do work. ![]() Electricity is the movement of electrons.
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