Can a Mistake in KVL Analysis Disprove a Fundamental Law?

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SUMMARY

The discussion centers on the application of Kirchhoff's Voltage Law (KVL) in circuit analysis. The user initially encountered an inconsistency when calculating voltages in two loops, obtaining +5V in loop 1 and -5V in loop 2. The confusion stemmed from neglecting a 10V drop across a diode, which is crucial for accurate KVL application. The resolution highlights the importance of accounting for all voltage drops in circuit analysis.

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sandy.bridge
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Here's my work. When I apply KVL around loop 1, I get +5V, but when I apply it around loop 2, I get -5, which is inconsistent with my first results?

Where am I going wrong, or have I disproved a fundamental law?

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Sorry, my work got cut out. The bottom says: +V+5=0, V=-5
 
I only see one loop. And what's the diode and resistor on the left supposed to be indicating?
 
I had redrawn the network on the left and configured it to the form on the right. This is how my textbook deals with KVL.
 
Never mind. I figured it out. I entirely forgot that there is a 10V drop across the diode.
 
Last edited:

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