Figuring Out Current Above the Junction: A Puzzling Problem

  • Thread starter Thread starter happytailsgal
  • Start date Start date
  • Tags Tags
    Current Junction
Join the discussion
Registration is free. Ask a follow-up in this thread, or start your own.
1 reply · 9K views
happytailsgal
Messages
3
Reaction score
0

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?
 

Attachments

  • current.jpg
    current.jpg
    7.5 KB · Views: 948
Physics news on Phys.org
What does Kirchhoff's Current Law say?

Above the junction, current is labelled as I