AC versus DC power transmission (2 - Electricity Distribution)

Why is AC used more often than DC? And why are power lines usually at high voltages? Here I explain the history of alternating and direct current and work an example showing how high voltage transmission is more efficient in terms of line losses. Then I relate this to the use of AC for electricity distribution.

Full edX course with interspersed practice problems to help you learn:
https://www.edx.org/learn/electricity...

Aaron Danner is a professor in the Department of Electrical and Computer Engineering at the National University of Singapore.
https://www.ece.nus.edu.sg/stfpage/el...

Video filmed and edited by Cheryl Lim.
@randomcheryl