What is a Bode plot commonly used for in electronics?

A Bode plot is specifically used to represent a system's frequency response, illustrating how the system behaves at different frequencies. This graphical representation comprises two plots: one showing the magnitude of the system's output as a function of frequency (often in decibels) and the other showing the phase shift of the output relative to the input (in degrees) as a function of frequency. The ability to visualize both magnitude and phase provides engineers with critical insights into the stability and performance of control systems and filters, enabling them to make better design decisions.

In this context, options that might involve circuit diagrams or measuring voltage, while relevant to electronics, do not capture the primary purpose of a Bode plot, which is focused on analyzing frequency response. Displaying load characteristics might pertain more to different types of graphs or analyses, but it does not encompass the specific usage of a Bode plot in the context of system frequency behavior. Thus, the distinction regarding frequency response makes the selection of the correct answer evident.