[bb88]

Maybe take some EE courses then? They're not that hard...

From EE101: P=V * I. But power transmission losses are I^2 * R.

So one way to transmit large amounts of power with low losses is to, well, turn the voltage up and use a lower current.

And with lower current, you can use smaller cables.

And in fact, that's what we do.

That's why your power lines to your house are thousands of volts and the transformer hanging on the pole will convert it into 220V (but with higher current to run your hair dryer, say).