What is the easiest voltage amplitude to measure on an oscilloscope when viewing a pure sine wave signal?

The peak-to-peak voltage is the easiest voltage amplitude to measure on an oscilloscope when viewing a pure sine wave signal because it represents the total vertical distance between the maximum peak and the minimum peak of the waveform. This measurement is straightforward to obtain since the oscilloscope displays the waveform as it oscillates, showing the highest and lowest points directly on the screen.

By using the horizontal and vertical controls of the oscilloscope, an operator can easily determine these extremes, making the peak-to-peak measurement a visual and intuitive process. Additionally, this form of measurement encompasses the full range of the signal, providing a clear indication of its amplitude without requiring additional calculations or conversions.

In contrast, measurements like average voltage, RMS voltage, and peak voltage may require computations or additional adjustments. For example, average voltage for a sine wave is usually zero when measured over a full cycle, and RMS (Root Mean Square) voltage involves a calculation based on the square of the instantaneous values of the sine wave. Peak voltage only informs of the highest amplitude but doesn't capture the entire range of the signal. Thus, the peak-to-peak measurement stands out as the most user-friendly and effective method in this context.