I'm supposed to write a brief essay response to this question on my unit exam, and I don't exactly understand it. Please explain it to me, and then I can appropriately write the short essay. Thanks! 1. The problem statement, all variables and given/known data "The energy companies use step-up transformers to send high voltage electricity over their wires, then use step-down transformers to reduce the voltage when it enters your house. What is the advantage of transmitting the electricity at a high voltage?" 2. Relevant equations This is really just a concepts question, so I don't think I need to list equations. There aren't any given values in the question. 3. The attempt at a solution I don't really know why transmitting electricity at a high voltage has advantages or what the advantages are... I think it might have something to do with efficiency and/or conserving loss of charge over distances. Transformers have about the same output power (less in reality) to the input power. I think the current in sending electricity at high voltage is faster and more constant?