If someone wants to find the total resistance of a circuit he has to deactivate the independent current sources.
As an ideal independent voltage source has zero resistance and the ideal independent current source has infinite resistance, either working or not, why do we need to deactivate them? Can't we just leave them be and just consider their resistances as zero and infinite respectively?
Simply put do we need to disable them so no current can flow in the circuit (for some reason) or we just do it as a visual aid in order to point out that those element has those resistance "values" in an attempt to simplify the circuit?
My question is purely theoretical and it doesn't have to do with real circuits and resistance measurements with a multimeter.