Resistor

The Same 100 Ohm Resistor Behaves Differently at 3 V and 5 V

A 100 Ω resistor is still a 100 Ω resistor whether it is connected to 3 V or 5 V, provided it remains within its specified operating conditions. What changes is not the nominal resistance but the electrical state around it: current, voltage drop, and power dissipation. That distinction matters because a resistor does not generate an output voltage on its own. Its voltage and current are determined by the surrounding circuit.