The regulation of short-term changes in the load resistance of a power supply is called:

'Dynamic regulation' describes a power supply's ability to respond to and stabilize short-term, rapid fluctuations in load resistance. When a connected device suddenly draws a spike of current (a transient), the voltage will momentarily dip until the regulator's feedback loop catches up. The measurement of how well the power supply handles this transient response is its dynamic regulation. This contrasts with 'static regulation,' which applies to long-term, steady-state changes. Terms like 'active' or 'analog' regulation are incorrect distractors that do not specifically refer to transient load handling.