Question
Which of the following is an advantage of an oscilloscope versus a digital voltmeter?
Answer Options
- A) An oscilloscope uses less power
- B) Complex impedances can be easily measured
- C) Greater precision
- D) Complex waveforms can be measured
Correct Answer: D
Explanation
A digital voltmeter (DVM) is designed to measure static values like RMS voltage or resistance, giving a single numerical reading. While accurate for simple DC or sine wave AC measurements, a DVM cannot show the shape of a signal that changes over time.
An oscilloscope, conversely, displays voltage versus time, allowing the user to visually inspect the signal. This is a critical advantage because complex waveforms can be measured and analyzed for characteristics like distortion, rise/fall times, modulation envelopes, and frequency content, none of which a simple DVM can reveal.
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