Recreational Vehicle (RV) Technician Practice Test

The function of a transformer in an electrical system is to change voltage levels. Transformers operate on the principle of electromagnetic induction and are primarily used to either step up (increase) or step down (decrease) voltage levels in an AC circuit. This ability to adjust voltages makes transformers essential for efficient power distribution, as they allow voltage levels to be raised for long-distance transmission, reducing power loss, and then lowered again for safe usage in homes and businesses. While converting electrical energy into mechanical energy is characteristic of devices like motors and generators, storing electrical energy is not a function of transformers but rather of capacitors or batteries. Measuring current flow is the role of ammeters, not transformers. Thus, the role of adjusting voltage levels distinctly highlights the primary purpose of a transformer in electrical systems.