Understanding Voltage in a Simple Circuit | Physics Forums

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In a simple circuit, the voltage V^- is equal to the voltage across resistor R2 because they are directly connected, sharing the same potential relative to the reference node (ground). This relationship can be understood through Kirchhoff's Voltage Law (KVL), which states that the total voltage around a closed loop must equal zero. Since V^- connects to the top of R2, both points must maintain the same voltage level. This principle is crucial for analyzing circuits and understanding voltage distribution. The discussion emphasizes the importance of recognizing connections in circuit analysis.
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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^-##
 
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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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