What is the primary function of a transformer?

The primary function of a transformer is to change the voltage level in AC circuits. Transformers operate on the principle of electromagnetic induction and are essential for adjusting voltage levels to ensure that electricity can be transmitted efficiently over long distances. Increasing the voltage reduces current flow, which minimizes energy loss as heat due to the resistance of transmission lines, while lowering the voltage makes electricity safer for use in homes and businesses.

Transformers do not generate power, store electrical charge, or convert AC to DC. Rather, they are specifically designed to step up (increase) or step down (decrease) an alternating current voltage, allowing for the effective distribution and utilization of electrical energy in various applications. This capability of altering voltage levels is crucial in the electrical grid and many electronic devices, highlighting the importance of transformers in modern electrical systems.