vaihtovirrassa
Vaihtovirrassa, often translated as alternating current (AC), is an electric current that periodically reverses direction. This is in contrast to direct current (DC), which flows in only one direction. The fundamental characteristic of AC is its sinusoidal waveform, meaning the voltage and current vary smoothly over time, peaking at regular intervals and then reversing to peak in the opposite direction.
The generation of AC is typically accomplished by rotating a coil of wire within a magnetic field
Most household electrical outlets provide AC power. The frequency of AC varies by region; in Europe and