sähköjänniteen

Sähköjännite, often referred to as voltage, is a fundamental concept in electrical engineering and physics. It represents the electric potential difference between two points in an electric field. Think of it as the "pressure" that drives electric charge, measured in volts (V). A higher voltage means a greater potential to do work on charges.

In simpler terms, voltage is what causes electrons to flow through a conductor, creating an electric current. It's analogous to water pressure in a plumbing system; just as water flows from a high-pressure area to a low-pressure area, electric charge flows from a point of higher electric potential to a point of lower electric potential.

The unit of voltage is the volt, named after Italian physicist Alessandro Volta. One volt is defined as the electric potential difference between two points of a conductor when an electric current of one ampere dissipates one watt of power between those points.

Voltage can be generated in various ways, including chemical reactions in batteries, electromagnetic induction in generators, and the conversion of solar energy in photovoltaic cells. It is a crucial parameter in understanding and designing electrical circuits, as it directly influences the behavior of current and power. Without voltage, there would be no flow of electricity.