What is a common application of a transformer?

A transformer is primarily used for stepping up or stepping down voltage levels in an electrical circuit. This process is essential in electrical power transmission, where voltages need to be increased to reduce energy losses during long-distance transmission. By stepping up the voltage, the current is reduced, allowing power to be transmitted more efficiently over long distances.

Conversely, when power reaches its destination, transformers step down the voltage to safe and usable levels for residential and commercial applications. This capability allows transformers to match the voltage requirements of various systems and devices, making them vital components in the distribution of electrical power. Therefore, understanding the role of transformers in regulating voltage is key to grasping their importance in electrical engineering and utility systems.