This may be a simple question, but it is something that I can't seem to wrap my head around.
I have a +12v 5A power supply at work which has two knobs, one for voltage and one for current.
There are various devices that upon plugging them in I have to increase the current otherwise they will not work, but when I do this, the voltage level stays the same.
My question is, what exactly is happening when I turn the amperage knob on a benchtop power supply? My guess would be that we are changing the resistance being supplied to the device but I am unsure and would love a real explanation!