1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homopolar Motor Limiting factor angular velocity

  1. Aug 8, 2012 #1
    I am doing an experiment involving determing the angular velocity of a homopolar motor (simple set up of the screw, battery, magnet and copper wire) and was wondering what the limiting factor on the speed would be. One website suggests that this might be back emf.
  2. jcsd
  3. Aug 8, 2012 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Normally that type of motor would accelerate until the back emf equals the battery voltage (roughly). However I suspect that air drag and other sources of friction might represent a significant load for such a low power motor?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook