Vaihtosignaalin

Vaihtosignaalin, or alternating signal, refers to an electrical signal that periodically reverses its polarity or direction. Unlike a direct current (DC) signal, which flows in one direction consistently, a vaihtosignaalin changes its voltage or current direction over time. This change is often cyclical, forming a waveform. The most common type of alternating signal is a sinusoidal wave, characterized by its smooth, oscillating pattern. However, alternating signals can also take other forms, such as square waves, sawtooth waves, or triangular waves, depending on the application.

The rate at which a vaihtosignaalin reverses direction is known as its frequency, typically measured in Hertz (Hz), indicating cycles per second. The magnitude of the signal's variation from its average value is its amplitude. Alternating signals are fundamental to many electronic systems and power transmission. They are used to carry information in radio and telecommunications, to drive motors and other electrical devices, and as the basis for alternating current (AC) electricity supplied to homes and businesses. The ability to easily transform the voltage of alternating signals using transformers is a key advantage for efficient long-distance power transmission.