Because AC generators generate sine wave outputs.Why do we use only Sinusoidal Wave in AC supply why not the Square,Triangle or Sawtooth etc
It has special properties, one of which is the following. No other periodic wave will pass through a linear network containing energy storage elements, (capacitors and inductors) and leave with the same frequency and shape except for phase and amplitude changes. All those other waves you mentioned will not have the same output shape as the input shape. That is because the derivative and integral of a sinusoidal wave are the same except for phase differences.Why do we use only Sinusoidal Wave in AC supply why not the Square,Triangle or Sawtooth etc
Yes but this is a coincidence with the properties of sine waves Ratch said.The more physical reason (and historical too), as leftyretro already said, is the mechanical AC generator. Because it always provided sinus voltage, and it always will (try making a mechanical swatooth-voltage power generator with reasonable efficiency), we will always have the AC power in form of sinus waves.
Can we interpret your answer to mean that the physical explanation, at least for power generation and transmission, is that the sine wave is the most energy efficient?The original question is actually very reasonable, but Mik did ask for a physical justification as well, which has yet to be provided.
Well yes and no.Can we interpret your answer to mean that the physical explanation, at least for power generation and transmission, is that the sine wave is the most energy efficient?