Testing a stiff region of a voltage source.
The Resistor having a resistance of 1Ω is the internal resistance (Rin) of the battery.
The potentiometer is the load resistance.
Notice, when the Load resistance is high enough(by changing the percentage of resistance of the potentiometer), the voltage drops across the (Rin) is low.
The region where the voltage drops across the Internal resistance is not causing any change is the stiff region.
Usually, the stiff resistance region occurs when
The Load resistance ≥ 100*(Rin)
In our case,
The load resistance≥100*1Ω ≥100Ω
I know the current will be decrease a lot. This is for study case and peer review
