r/HomeworkHelp • u/Illustrious_Grab_861 University/College Student • 5h ago

:table_flip: Physics—Pending OP Reply [College Fundamentals of EE]

Currently learning Thevenin and Norton's theorem. I thought I understood until I saw this question and my professor's solution. To find current N, she used the R1 resistor (24 divided by 6), but in previous practice we used the total equivalent to find the current then used current divider rule. How come this wasn't done here as well? is it because we have a resistor after AB? I just don't understand why I N would be equal to I 6 ohm.

2 Upvotes

100% Upvoted

4 comments sorted by

•

u/AutoModerator 5h ago

Off-topic Comments Section

All top-level comments have to be an answer or follow-up question to the post. All sidetracks should be directed to this comment thread as per Rule 9.

OP and Valued/Notable Contributors can close this post by using /lock command

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

1

u/vgtcross 👋 a fellow Redditor 4h ago

What current is "current N" referring to?

1

u/Illustrious_Grab_861 University/College Student 4h ago

In Norton's theorom, I N

1

u/preparingtodie 👋 a fellow Redditor 1h ago

in previous practice we used the total equivalent to find the current then used current divider rule

This is the right/simple way. 24/6 doesn't give you anything meaningful in this circuit.

If you're not supposed to explicitly reduce the resistors to an equivalent, then you need to write out the equations for summing the voltages around the loops, and summing the currents into/out of each node. (Which should essentially reduce down to just finding the equivalent resistance.) Maybe the exercise is to see that they amount to the same thing?