In high-voltage systems, what is a common voltage range needed for transferring electricity over long distances?

The voltage range of 138,000 to 765,000 volts is commonly utilized in high-voltage systems for the efficient transmission of electricity over long distances. This range is crucial because higher voltages significantly reduce energy losses due to resistance in the transmission lines. When electricity travels long distances, a higher voltage minimizes the current flowing through the conductors, which in turn decreases the I²R losses (where I is current and R is resistance).

Transmission systems operating within this range are often used by utility companies to transport power from generation plants to substations and ultimately to consumers. By utilizing high voltages, utilities can maintain efficient power flow, which is essential for meeting demand and ensuring a reliable supply of electricity.

Lower voltage options, such as those listed in the other choices, are generally not suitable for long-distance transmission due to higher losses and decreased efficiency, making them more appropriate for local distribution networks rather than extensive transmission systems.