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: Wheatstone Bridge Question

  1. Apr 3, 2010 #1
    1. The problem statement, all variables and given/known data

    Suppose that in the course of a measurement the bridge is balanced and then the power supply voltage changes by 10%, what will happen to the balance of the bridge? Explain.

    2. Relevant equations

    No equations.

    3. The attempt at a solution

    When I think it out logically, I don't think the balance should be affected. Because if the voltage increases, the values of the resistances will still be balanced. Is this wrong?

    But then I think if the voltage increases, you have to balance the bridge out again.
  2. jcsd
  3. Apr 3, 2010 #2
    What is the condition for the four resistances to make a wheatstone bridge balanced? Does the supply voltage come into it?
  4. Apr 3, 2010 #3
    R1/R2 = R3/R4

    i don't think these values would change if the voltage changes 10% during the measurements.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook