Diameter of the pipe is resistance. Volts is more like water pressure and amp is like flow rate. See ohms law.
That's why some random fusebox can kill you with a milliamp (stop your heart) but you can run into an electric fence with 1000s of volts and get back up. As amps drop voltage increases.
V = I × R
Volts are set, Resistance is set (you)
Leaving I variable. The voltage that is set, and the resistance that is set, will determine how much amps is tried to be pulled. However Power sources have max amps they can provide. Their A ratings are not the amps that are forced at all times, but their max that can be delivered.
If the power source doesn't provide enough max amps (* voltage, aka Watts) for your level of R, then you don't get smoked / light up.
It's funny how you referenced ohms law at the end of your first paragraph, then got it wrong at the end of your second paragraph.
Lol yeah well like I said I only pretended to be an electrician. Really just used an ohms law app.
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