why are transformers used in long distance power lines?

Transformers are used in long-distance power lines primarily to increase the voltage of electricity for efficient transmission. By stepping up the voltage, transformers reduce the current flowing through the lines, which minimizes energy losses due to resistance. This allows electricity to travel over vast distances with less power loss, ensuring that more energy reaches its destination. Upon reaching the distribution area, transformers step down the voltage to safer levels for consumer use.