what role does a transformer play in power transmission?

A transformer plays a crucial role in power transmission by stepping up or stepping down voltage levels to optimize efficiency. In high-voltage transmission, transformers increase voltage to reduce current, minimizing energy loss due to resistance in the lines. Conversely, at the distribution stage, transformers lower the voltage to safe levels for consumer use. This voltage adjustment is essential for effective long-distance power transmission and ensuring safe delivery to end-users.