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Lower Load Impedance Pulls Output Down

Changing the load changes the measured output voltage. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

A larger load impedance keeps more voltage

With load 6 ohms, the load receives 12 volts.

16⋅68=1216\cdot {6\over 8}=12
Lighter loadThe larger load gets the larger voltage share.2 ohm6 ohmV12 V+-4 V+-12 Vresistive

A lower load impedance pulls the output down

With load 2 ohms, the output is only 8 volts.

16⋅24=816\cdot {2\over 4}=8
Heavier loadChanging the load changes the checked output.2 ohm2 ohmV8 V+-8 V+-8 Vresistive