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: Calculating voltage

  1. May 2, 2010 #1
    1. The problem statement, all variables and given/known data
    R1=30Ω R2=20Ω R3=20Ω R4=10Ω R5=40Ω R6=10Ω I4=4A
    I need to calculate U (total voltage)

    2. Relevant equations

    3. The attempt at a solution

    213,33V is not correct...
    Last edited: May 2, 2010
  2. jcsd
  3. May 2, 2010 #2


    User Avatar
    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi stefanomm! Welcome to PF! :smile:

    (try using the X2 tag just above the Reply box :wink:)
    No, I4 is the current through R4 only

    you need to find the "overall" current

    (call it I, and find the relation between I and I4). :smile:
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook