Final answer:
The change in output voltage from no-load to full-load conditions is known as voltage regulation, illustrating the effect of internal resistance and load on voltage sources.
Step-by-step explanation:
The term that describes a change in output voltage from no-load to full-load conditions is known as voltage regulation. The concept of voltage regulation relates to how the terminal voltage of a device, such as a battery, changes with varying load conditions. When a load, such as a resistor, is connected to a battery, the terminal voltage V is calculated as V = emf - Ir, where emf is the electromotive force, I is the current, and r is the internal resistance. With no load, the current is zero, thus making the terminal voltage equal to the emf. Under full load, the current is at its maximum, and the voltage drops due to the internal resistance (Ir component). This change in terminal voltage illustrates the effect of internal resistance and load on the performance of batteries and other voltage sources.