Which type of voltage is used to represent the logic '1' state of a statement?

The concept of representing logical states in digital electronics is crucial for understanding how digital circuits function. In this context, the correct choice refers to logic polarity, which defines the conventional way that binary states are represented in digital systems.

Logic levels typically assign a high voltage level to represent a logical '1' and a low voltage level for a logical '0'. This distinction is often referred to as logic polarity, indicating the relationship between the voltage levels and their corresponding logical states. In digital circuits, most commonly, a high voltage (often around 5V for TTL logic) will correspond to a '1', while a low or ground voltage (0V) corresponds to a '0'.

Other options such as analog voltage refer to continuously variable voltage levels that do not specifically correspond to discrete states like '1' or '0'. AC voltage involves alternating current which continuously changes polarity and therefore would not be suitable for representing binary states consistently. DC voltage, while it can represent a stable '1' state when at a certain level, does not specifically address the concept of polarity as it pertains to logic design.

Thus, logic polarity encapsulates the principle of how specific voltage levels are interpreted within a digital logic framework to denote binary information.