Moving these charges can be harnessed to do work. Electrons are atomic particles with a negative charge. Fear not, however, this lab activity will give you the basic understanding of voltage, current, and resistance and how the three relate to each other.Įlectricity is the movement (flow) of electrons. In order to detect this electrical energy, we must use measurement tools such as multi-meters, oscilloscopes and spectrum analyzers to visualize what is happening with the electrical signals in a system. Even lightning in the sky, while visible, is not truly the energy exchange occurring from the clouds to the ground, but it is the heating of the air by the energy passing through it that produces the flashes of light. We cannot see with the unaided eye the energy flowing through a wire or the voltage of a battery sitting on a bench. At first, these concepts can be difficult to understand because they cannot be physically “seen”. ![]() ![]() These are the three basic quantities required to understand and use electricity. When beginning to explore electricity and Electrical Engineering, it is useful to start by understanding the basic relationships between voltage, current, and resistance.
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