vahelduvvoolugeneraatoriteks

vahelduvvoolug, more commonly known as alternating current (AC) electricity, is an electric current that periodically reverses direction. This is in contrast to direct current (DC), which flows in only one direction. The waveform of AC is typically a sine wave, although other shapes like square waves or triangle waves are also possible. The frequency of AC is the number of cycles the current completes per second, measured in Hertz (Hz). In most countries, the standard frequency for AC power distribution is 50 or 60 Hz.

The primary advantage of AC over DC for power transmission is its ability to be easily transformed to higher or lower voltages using transformers. This is crucial for efficient long-distance power delivery. High voltages are used for transmission to minimize energy loss due to resistance in the wires. Before reaching homes and businesses, these high voltages are stepped down to safer and more usable levels. AC power is the standard for electrical grids worldwide, powering everything from household appliances to industrial machinery. The generation of AC typically involves rotating machinery, such as alternators in power plants.