1. Not finding help here? Sign up for a free 30min 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!

Please answer this question

  1. Nov 12, 2006 #1
    In wheatstone bridge , if B an D are two points and if potential difference of B is greater than D,How current will flow?
    If possible you can draw a diagram and explain me how current will flow(send pdf or doc).It will be very helpful for me.
     
    Last edited by a moderator: Nov 12, 2006
  2. jcsd
  3. Nov 12, 2006 #2

    nrqed

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    First, it does not make sense to talk about the potential difference at one point. One may only define the potential at one point and the potential difference between points. If you mean that the potential at B is greater than at D, then positive charges released at rest at B would move toward B and vice versa for negative charges. Since the current is defined in terms of the flow of positive charges (even though it's actually electrons which are moving), the current flows from points of higher potential to points of lower potential.
     
    Last edited: Nov 12, 2006
  4. Nov 12, 2006 #3

    FredGarvin

    User Avatar
    Science Advisor

    It also helps to know what resistors you are labelling as B and D.
     
  5. Nov 12, 2006 #4

    Gokul43201

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    1. Please read the posting rules for this forum - we can not help you with coursework unless you show us what effort you've made.

    2. The question is vague and incomplete. At least draw or describe the bridge and indicate where the points lie.

    3. All homework discussion is to be had in the forums, so that future questions along these same lines can be directed to this thread.
     
    Last edited by a moderator: Nov 12, 2006
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?