For a simple network of resistive circuit, we can compute the values of current and voltages right? However, I'm more curious about how each individual component behave. Is it possible to somehow isolate each resistor and compute their values individually (e.g. not having to compute the entire network first but through step-by-step, one component at a time, being able to compute the desired quantity, the bottom-up approach.) If so, how can this be done. Will the continuity equation in a closed system possibly give a solution? More exactly, how does electrons behave during their propagation through a material (in this case, a resistor, for simplicity).