What does microvolt (uV) measure in relation to a Volt?

A microvolt (uV) is a unit of measurement for electric potential. Specifically, it is one-millionth of a volt. This relationship means that when you reference the measurement of microvolts, you are looking at a scale that is 1,000,000 times smaller than that of a single volt.

This detailed understanding of the conversion between volts and microvolts stems from the metric system's use of prefixes to denote powers of ten. In this case, the prefix "micro-" signifies a factor of (10^{-6}), which directly translates to one-millionth. Therefore, there are 1,000,000 microvolts in one volt, affirming why the correct answer is indeed that a microvolt measures 1,000,000 times smaller than a volt. Understanding this relationship is crucial in fields such as electronics and electrical engineering, where precise measurements of small voltages are often necessary.