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Homework Help: Working out the p.d.

  1. Dec 26, 2009 #1
    1. The problem statement, all variables and given/known data
    What is the p.d. across EC?

    Sorry about the bad drawing.
    2. Relevant equations

    3. The attempt at a solution

    I know you need to split the 4 V into the 2 k ohms, 2 k ohms and 1 kilo ohm. The answer is 3 V. I'm not sure how to get this answer. Someone explain please?

    Attached Files:

  2. jcsd
  3. Dec 26, 2009 #2
    What have you tried all ready? I'll help by saying that ruling out any voltage drop in the wire:

    Voltage at A = Voltage at E = 4V
  4. Dec 26, 2009 #3
    I'm really not sure. I've tried the V between C and D to be o.5 V and the V between E+F and F+G to be 1 V, but it doesn't work..

    I've tried lots of other combinations too. Is there an easy way to calculate? I mean if I was in an exam this question would take me a while because all I am doing is guessing numbers.
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