tasavirtasähköä

Tasavirtasähkö, also known as direct current (DC) electricity, is a type of electrical current that flows in only one direction. This is in contrast to alternating current (AC), where the direction of the current periodically reverses. In a DC circuit, electrons move from a region of lower potential (negative terminal) to a region of higher potential (positive terminal).

Common sources of tasavirtasähkö include batteries, fuel cells, and solar panels. These devices convert chemical or light energy directly into electrical energy. The voltage in a DC circuit remains constant over time, although it can vary in magnitude depending on the source.

Tasavirtasähkö is essential for many electronic devices, such as smartphones, laptops, and LED lights. These devices often contain internal components that are specifically designed to operate on DC power. While AC electricity is commonly used for power transmission over long distances due to its ease of voltage transformation, DC is preferred for local distribution and within many electronic systems. Rectifiers are devices used to convert AC into DC.