Figuring Out Current Above the Junction: A Puzzling Problem

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SUMMARY

The discussion centers on determining the current in a wire above a junction in an electrical circuit. Participants reference Ohm's Law (V=IR) and Kirchhoff's Current Law to analyze the problem. The confusion arises from interpreting the term "above the junction" and how to apply the laws correctly to calculate the current. Ultimately, the current above the junction is denoted as I, indicating a need for clarity in circuit analysis.

PREREQUISITES
  • Understanding of Ohm's Law (V=IR)
  • Familiarity with Kirchhoff's Current Law
  • Basic knowledge of electrical circuit components
  • Ability to interpret circuit diagrams
NEXT STEPS
  • Review circuit analysis techniques using Kirchhoff's Laws
  • Practice problems involving current calculations in complex circuits
  • Learn about series and parallel resistor combinations
  • Explore advanced topics in electrical engineering, such as nodal analysis
USEFUL FOR

Students studying electrical engineering, educators teaching circuit analysis, and anyone seeking to enhance their understanding of current flow in electrical circuits.

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Homework Statement



In the figure, what is the current in the wire above the junction?


Homework Equations



V=IR or I=V/R

The Attempt at a Solution


I am really confused as to what "above the junction" means. I tried to add the voltages and add the resistors and divide them to get the current and it didn't work. Then I tried to just do the top voltage and resistor (so it would be three) and that didn't work either. What am I doing wrong?
 

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What does Kirchhoff's Current Law say?

Above the junction, current is labelled as I
 

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