Which of these statements is true regarding 500 kV transmission lines?

The statement that 500 kV transmission lines can carry more power with less current is true due to the relationship between voltage, current, and power. Power is calculated using the formula P = V × I, where P is power, V is voltage, and I is current. Increasing the voltage allows for the transmission of the same amount of power at a lower current. This is advantageous because higher current levels can lead to increased resistive losses (I²R losses) in the transmission lines, which can reduce efficiency.

By operating at higher voltage levels, such as 500 kV, the electricity can be transmitted over long distances more efficiently, enabling the utility companies to move large amounts of power while minimizing losses associated with the resistance of the conductors. This is one of the primary reasons why high-voltage transmission lines are favored for bulk power transmission.

In contrast, underground transmission lines are often used for urban and densely populated areas where overhead lines may not be feasible or desirable, but 500 kV lines are predominantly found above ground due to the significant challenges of insulating and cooling such high-voltage underground installations. Additionally, the right-of-way requirements for high-voltage lines are generally greater than for lower voltage lines due to safety zones, which