AhaBulbStuff Everyone Should Know
AhaBulb: Stuff Everyone Should Know · ahabulb.com/eng-three-phase-120-degrees

In three-phase power, how far apart in phase are the three voltages?

Start playing free

  1. 90 degrees
  2. 120 degrees
  3. 180 degrees

🔒 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. IEEE Technology Navigator, Three-phase Electric Power technav.ieee.org/topic/three-phase-electric-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

EngineeringNorth America's grid runs at 60 Hz. What frequency does Europe's grid use?EngineeringHow many base units does the International System of Units (SI) have?EngineeringSince the SI redefinition voted in 2018, what defines the kilogram?

That's stuff everyone should know.