I am not an electrical engineer so my concept about the practical side of ohm's law is very flimsy. What I am going to ask may sound childish but please try to explain as best as possible.
When you put let's say two things in series; an led (let's assume 150ohm) and a small 100ohm resistor, then you attach it to eight(8) 1.5v batteries, the current flowing through the circuit can be calculated by the ohms law as follows:
I = V/R = 12/250 = 0.048 amperes
A lot of internet articles say "provide" a certain current to the circuit. Does it mean that let's say if for the above circuit if you had to run 1 ampere through it, you will have to ramp up the voltage to 250?
My understanding that if the supply has no current limitation, then the current flowing through a circuit will be as per the Ohm's law. Otherwise you have to play with voltage to get a certain current flow through the circuit.
I mean can you actually force a certain current through a circuit without playing with voltage or the resistance? Could there be 2 similar voltage supplies but one with higher current than the other?