Consider an automobile ignition system that produces high voltage from the battery essential for generating a spark. This system can be modeled as a simple series RLC circuit and the complete response of the circuit can be analyzed. Here, the input DC voltage serves as a forcing step function resulting in a forced step response that mirrors the characteristics of the forcing function. Applying Kirchhoff's voltage law to the circuit yields a second-order differential equation. This equation resembles the second-order differential equation of a source-free RLC circuit, showing that the DC source does not alter the form of the equations. The complete solution to this equation is a combination of transient and steady-state responses. The transient response, which diminishes over time, corresponds to the solution for source-free circuits in overdamped, critically damped, and underdamped scenarios. The steady-state response corresponds to the final value of the capacitor voltage, which is identical to the source voltage. The constants involved can be deduced from the initial conditions of the circuit.