Understanding Voltage in a Simple Circuit | Physics Forums

[pinkcashmere]

Homework Statement

Can someone why the voltage $V^-$ is the same voltage as that of R2?

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

Homework Equations

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The Attempt at a Solution

is it an application of KVL concerning the voltage for R1 and $V^-$

 

[gneill]

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).