An oscilloscope measures the

Options

A. Peak to peak value of AC voltage
B. RMS value of AC voltage
C. D.C. value of a voltage
D. None of the above.

Answer

To solve the question regarding what an oscilloscope measures, we can follow these steps:

### Step 1: Understand the Function of an Oscilloscope
An oscilloscope is an electronic instrument used to observe the changing signal voltages, typically as a two-dimensional plot of one or more signals versus time.

### Step 2: Identify the Types of Measurements
Oscilloscopes can measure various electrical parameters, including:
- DC voltage
- AC voltage
- Peak voltage
- RMS voltage
- Frequency
- Waveform shape

### Step 3: Differentiate Between Measurement Types
- **DC Voltage**: Measured using a multimeter.
- **RMS Voltage of AC**: Typically measured using analog meters like electrodynamometers.
- **Peak Voltage**: The maximum voltage level in a waveform.
- **Peak-to-Peak Voltage**: The difference between the maximum and minimum voltage levels in a waveform.

### Step 4: Focus on the Key Measurement of Oscilloscope
The oscilloscope is particularly known for measuring the **peak-to-peak voltage** of AC signals. This is the value that represents the total voltage swing from the highest point to the lowest point in a waveform.

### Step 5: Conclusion
Based on the understanding that oscilloscopes are primarily used to measure the peak-to-peak voltage of AC signals, we can conclude that the answer to the question is:

**Answer: Peak-to-Peak Value of AC Voltage (Option A)**

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