Feszültségforrásnak

Feszültségforrásnak refers to a voltage source in physics and electrical engineering. A voltage source is an active component that supplies electrical energy to an electric circuit. It is characterized by its ability to maintain a constant potential difference across its terminals, regardless of the current drawn from it. In an ideal voltage source, this potential difference is precisely fixed and independent of the load connected. Real-world voltage sources, however, have internal resistance which causes their output voltage to decrease as the current drawn increases.

There are two primary types of voltage sources: direct current (DC) and alternating current (AC). A DC voltage source provides a potential difference that remains constant in polarity over time, such as that provided by a battery or a DC power supply. An AC voltage source, on the other hand, produces a potential difference that periodically reverses its polarity, typically in a sinusoidal pattern, as seen from mains electricity outlets or AC generators.

The concept of a voltage source is fundamental to understanding circuit analysis. Kirchhoff's voltage law, for instance, describes the relationship between voltage sources, voltage drops across components, and the loop in a circuit. The unit of voltage is the volt (V), named after Alessandro Volta, an Italian physicist. Voltage sources are essential components in nearly all electronic devices and electrical systems, powering everything from small sensors to large industrial machinery.