váltakozóáramú

Váltakozóáramú refers to alternating current (AC) electricity. Unlike direct current (DC) where the electric charge flows in only one direction, alternating current periodically reverses its direction. This reversal happens at a specific frequency, typically measured in Hertz (Hz). For example, in many parts of the world, the standard frequency is 50 Hz, meaning the current reverses direction 50 times per second.

The primary advantage of alternating current is its ability to be efficiently transformed to higher or lower voltages using transformers. This is crucial for transmitting electricity over long distances. High voltages are used to minimize power loss during transmission, and then transformers are used to step down the voltage to safer levels for use in homes and businesses.

Alternating current is the standard form of electricity supplied by power grids worldwide. It is generated by devices called alternators, which utilize electromagnetic induction. The waveform of alternating current is typically sinusoidal, meaning it follows a sine wave pattern over time. However, other waveforms like square waves and triangular waves can also be considered alternating currents, though they are less common in standard power distribution. The concept of alternating current is fundamental to the operation of many electrical devices and systems.