Växelströomens

Växelströmens, meaning alternating current in Swedish, refers to the flow of electric charge that periodically reverses direction. Unlike direct current (DC) where the charge flows consistently in one direction, alternating current (AC) oscillates back and forth. This oscillation is typically sinusoidal, meaning the voltage and current vary over time in a smooth wave pattern. The frequency of this oscillation is measured in Hertz (Hz), indicating the number of complete cycles per second. In most countries, the standard frequency for household electricity is 50 Hz or 60 Hz.

The primary advantage of AC is its ability to be efficiently transformed to higher or lower voltages using transformers. This property makes it ideal for long-distance power transmission, as high voltages reduce energy loss over wires. Power can then be stepped down to safer and more usable levels for homes and businesses. Generators in power plants produce AC, and this form of electricity is what powers most of the electrical grid worldwide. Many common household appliances and electronic devices are designed to operate on AC power.