AC won the 1890s War of the Currents. What is high voltage DC (HVDC) used for today?

Start playing free

  1. Wiring inside homes
  2. Nothing; DC grids were abandoned
  3. Sending power long distances

🔒 The answer is for AhaBulb members. Members see the answer, why it's right and the official sources for every card of Stuff Every Engineer Should Know, plus timed practice exams.

The first 50 cards of every test are free to play.

Play the free cards See membership

Like this card?
Play the game

References

  1. US DOE, The War of the Currents: AC vs. DC Power www.energy.gov/articles/war-currents-ac-vs-dc-power Checked 2026-10-10.

Think this answer is wrong? Tap "Challenge this answer" on the card in the game and tell us why.

Test yourself in the game