What is one of the basic uses of transformers in electrical systems?

In electrical systems, transformers play a fundamental role primarily by providing voltage transformation for AC electrical energy. One of their basic uses is to create electrical references by isolating different parts of a system. This isolation not only reduces the risk of electrical shock but also helps in stabilizing the system by providing a reference point for ground potential, thereby enhancing overall system reliability and safety.

While other functions, such as amplification, noise filtering, or serving as backup power sources, may be facilitated by different technologies or components in electrical engineering, they do not fall under the primary applications of transformers. Transformers specifically focus on adjusting voltage levels and providing electrical isolation, making them vital for efficient power distribution and reliable operation of electrical systems.