When using an oscilloscope, what value is being measured?

When using an oscilloscope, what value is being measured?

• A. RMS value.
• B. Peak value.
• C. Average value.
• D. Total energy.

Answer: (B)

An oscilloscope directly shows how voltage changes over time, so the vertical deflection represents the instantaneous voltage at each moment. The most immediate single value that describes how large the signal gets is its peak value—the maximum voltage the waveform reaches relative to the reference during a cycle. RMS and average are quantities that require processing over time, and total energy isn’t what the scope displays. If you need those other quantities, you’d enable specific measurement features or compute them from the captured waveform.

An oscilloscope directly shows how voltage changes over time, so the vertical deflection represents the instantaneous voltage at each moment. The most immediate single value that describes how large the signal gets is its peak value—the maximum voltage the waveform reaches relative to the reference during a cycle. RMS and average are quantities that require processing over time, and total energy isn’t what the scope displays. If you need those other quantities, you’d enable specific measurement features or compute them from the captured waveform.