The principal advantage of sending electric power across long distances using low current is that
A) the charge can get from one point to another faster.
B) electric power lost in the wires is greatly reduced.
C) the transmission lines are less likely to get in the way than low voltage transmission lines-which are much closer to the ground.
D) low current means low resistance in the lines.

Question

Quizplus · Accepted Answer

The principal advantage of sending electric power across long distances using low current (achieved by increasing the voltage) is that it greatly reduces the power lost in the wires due to the Joule heating effect, which is proportional to the square of the current (P = I^2R). Lower current thus leads to significantly lower energy losses during transmission.

The Principal Advantage of Sending Electric Power Across Long Distances