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: Unbalanced Scheering Bridge and Thevenin

  1. Jul 19, 2010 #1
    1. The problem statement, all variables and given/known data

    Find the magnitude and phase of the current flowing through the galvanometer whose internal resistance is negligible.C1=C, C2=0, Cx=2C, R2=R3=R, Rx=0


    3. The attempt at a solution

    Magnitude of the current:

    Using the Thevenin equivalent circuit,

    Z1 = 1/jwC1 = 1/jwC
    Z2 = R2 || 1/jwC2 = R
    Zx = Rx + 1/jwCx = 1/jw2C
    Z3 = R3 = R

    Rth = (Z1 || Z2) + (Zx || Z3)
    Vth = V from c to b = Vc - Vb = Vac - Vab = E (Z1/(Z1+Z2) - Zx/(Zx+Z3))
    Ig = Vth/Rth

    Would this be correct?

    Have no idea on how to get the phase of the current....

  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted