Why is the AC in our homes a sine wave out of all math functions ??

Question

Why did they choose to make AC change in time based on a sin wave and not any other math function like quadratic or logarithmic

In: Physics

Answer 1

AC electricity is generated by spinning a generator. [Sin waves are linked to circular motion](https://i.stack.imgur.com/pQ377.gif).

So the AC coming out of a spinning generator is naturally a sin wave.

Now AC doesn’t *have* to be a sin wave, cheap DC to AC converters use a square wave but the sudden change from positive to negative tends to cause transformers in electronics to make a buzzing sound that you don’t get from a smooth sin wave.