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Simple circuit question

  1. Nov 20, 2015 #1
    1. The problem statement, all variables and given/known data
    Can someone why the voltage ##V^-## is the same voltage as that of R2?

    https://www.physicsforums.com/attachments/circuit-png.92144/ [Broken]

    2. Relevant equations
    -

    3. The attempt at a solution
    is it an application of KVL concerning the voltage for R1 and ##V^-##
     
    Last edited by a moderator: May 7, 2017
  2. jcsd
  3. Nov 20, 2015 #2

    gneill

    User Avatar

    Staff: Mentor

    According to your image V- is directly connected to the top of R2. So they must have the same potential with respect to the reference node (ground).
     
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