Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Question about back emf

  1. Jul 27, 2008 #1
    Ex:At home, you plug an electric drill into an electrical outlet and turn it on. At the moment you turn on the drill, the lights in the room(wired in parallel to the drill) flicker and dim briefly, but then return to normal after a moment.

    notice that the example is wired in parallel, but in series lights will just get dim and stay the same.

    what had happened in both of the case and how can i relate this to back emf?
     
  2. jcsd
  3. Jul 27, 2008 #2

    clem

    User Avatar
    Science Advisor

    When you turn the electric motor on, there is a surge of current, dimming other lights.
    When the motor gets up to speed, there is a back EMF in the circuit which reduces the current through the motor.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Question about back emf
  1. Back emf (Replies: 1)

  2. Back emf (Replies: 3)

  3. Back emf (Replies: 4)

Loading...