An oscilloscope can be used to perform all of the following except which?

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Multiple Choice

An oscilloscope can be used to perform all of the following except which?

An oscilloscope shows how electrical signals vary over time by measuring voltage with probes. That makes it perfect for comparing two signals to see how their phases line up, and for watching how a voltage changes across a component in real time. If you want to estimate current, you can place a known resistor in the circuit and measure the voltage across it; using Ohm’s law (I = V/R) lets you infer the current and thus the electron flow indirectly. Measuring the velocity of light with a LED isn’t something an oscilloscope can do. The device records electrical voltages, not the actual speed of photons through space, and measuring light speed requires a precise timing and distance setup with optical detectors, not just a voltage signal on a screen. So the option describing measuring velocity of light with a LED is not a practical or direct use of an oscilloscope.

An oscilloscope shows how electrical signals vary over time by measuring voltage with probes. That makes it perfect for comparing two signals to see how their phases line up, and for watching how a voltage changes across a component in real time. If you want to estimate current, you can place a known resistor in the circuit and measure the voltage across it; using Ohm’s law (I = V/R) lets you infer the current and thus the electron flow indirectly.

Measuring the velocity of light with a LED isn’t something an oscilloscope can do. The device records electrical voltages, not the actual speed of photons through space, and measuring light speed requires a precise timing and distance setup with optical detectors, not just a voltage signal on a screen. So the option describing measuring velocity of light with a LED is not a practical or direct use of an oscilloscope.

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