I understand the relation that Ohm's Law sets up: $$R=V/I$$
What I am confused about is what happens to maintain that relationship if the resistance suddenly changes.
If I have a circuit that starts off at a very high resistance but then suddenly decreases, the voltage would have to change for the current to stay the same. Conversely, in order for the voltage to stay the same, the current would have to change.
Which is it?
PS: Please do not use the hydraulic analogy in explaining this. It's both a severely limited approximate and does not describe the actual physics happening.