Vekselspænding
Vekselspænding, often abbreviated as AC (Alternating Current), is an electric current which periodically reverses direction, unlike direct current (DC) which flows only in one direction. This reversal of direction is accompanied by a reversal of voltage. The waveform of vekselspænding is typically sinusoidal, meaning it follows a sine wave pattern over time. The key characteristics of vekselspænding are its frequency and its amplitude. Frequency refers to the number of complete cycles of the current or voltage that occur in one second, measured in Hertz (Hz). Amplitude, also known as the peak voltage or peak current, represents the maximum value the voltage or current reaches during a cycle.
Vekselspænding is the standard form of electrical power distribution used in most countries because it can