What type of voltage is known to reverse polarity?

AC voltage, or alternating current voltage, is characterized by its ability to reverse polarity periodically. This means that the voltage level changes direction, oscillating between positive and negative values over time. This characteristic is a fundamental aspect of AC, which is generated in power systems for efficient electricity transmission and is commonly used in households and industries.

In contrast, DC voltage, or direct current voltage, flows in a constant direction with a fixed polarity, making it ideal for applications like battery power. Low voltage and high voltage refer to the levels of voltage but do not inherently describe the behavior of the voltage in terms of polarity reversal. Thus, only AC voltage demonstrates the ability to reverse polarity, making it the correct choice.