What is the purpose of an oscilloscope?

An oscilloscope is primarily utilized to visualize and analyze waveform shapes of electrical signals. By presenting signals in graphical form over time, it allows engineers and technicians to observe characteristics such as amplitude, frequency, and waveform distortion. This visualization is essential for diagnosing issues in circuits, evaluating performance, and ensuring that electronic devices function as intended.

The other choices describe functionalities that are not associated with an oscilloscope. Amplifying signals is typically the role of an amplifier, measuring resistance relates to the function of a multimeter or ohmmeter, and providing power to devices is the job of a power supply. By focusing on waveform visualization, an oscilloscope plays a critical role in the troubleshooting and design of electronic and electrical systems.