This simulation demonstrates the voltage response across resistor (R), inductor (L), and capacitor (C) when connected to a pulse input source. Three circuits are shown: R–R (resistor only), R–L (resistor–inductor), and R–C (resistor–capacitor). In the R–R circuit, the voltage follows the input pulse without delay, as resistors do not store energy. In the R–L circuit, the inductor resists sudden changes in current, creating a sharp voltage spike at the rising and falling edges of the pulse . In t