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!

Homework Help: Torque of motor varies as the cube of the speed means what?

  1. Jun 4, 2013 #1
    is this means that torque is proportional or inversely proportional to the cube of speed

    the problem says

    The torque of a load driven by a 385-V, Dc shunt motor varies as the cube of the speed. The current taken by the motor is 51A at a certian speed. Calculate the additional resistance to be inserted in series with the armature to reduce the speed to 50 percent of the original value. The armature circuit resistance is 0.5 ohms and the field-circuit resistance is 35 ohms

  2. jcsd
  3. Jun 4, 2013 #2


    User Avatar
    2017 Award

    Staff: Mentor

    Torque is proportional to the cube of speed.
  4. Jun 6, 2013 #3
    Thanks alot!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted