And why don't all power supplies with different volt values ​​do with a maximum ampere value?

Question

Iron

And why don't all power supplies with different volt values ​​do with a maximum ampere value? Well, for example, a power supply for 12 volts and 100 amperes? After all, the device will not burn out due to the fact that the volt is 12, but can you connect more different devices to it? What exactly are the differences between blocks of one volt, but different amperes?

Answer 1

In the internal device. An increase in current strength is a complication and an increase in the cost of the circuit, and a significant one.

Answer 2

Yopt, read the physics textbook for the ninth (in my opinion) class of the Soviet school. And stop asking stupid questions. Voltage is a quantitative characteristic. But the current is of high quality. It is the number of charge carriers, that is, electrons that have passed through the cross section of the conductor. More current means more carriers. More carriers - the wire heats up more. At a certain temperature, the wire melts stupidly - do you think powerful welders come with thick wires just like that?
100A is a very large current. Such a current is consumed by a trolleybus running along a flat road without braking or turning.

Answer 3

Compare the PSU of a computer and, for example, a router.
The greater the maximum current, the more complex the PSU device, the more materials are needed. Those. such a PSU will be larger, heavier and most importantly more expensive.

Answer 4

Look at the price and dimensions of power supplies for 1 and 20A for the same voltage.
The difference will be very significant.