lyxo

So, everyone that knows that all of the United States' and North America's appliances are 110V knows that mostly everywhere else in the world has electrical appliances that are 220V.

I've been searching google for quite some time and can't get the answer to this, so I'm hoping there's a physics major or electronics major out there somewhere that can help me out here.

I'm just wondering what the difference would be between the two, and why it isn't a global standard to have one.

Thanks.