Adding I1,I2,I3,I4 to Get I5 - Tips & Tricks

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Homework Help Overview

The discussion revolves around the calculation of the current I5 based on the contributions of currents I1, I2, I3, and I4. The context is related to electrical circuits and the conservation of electric charge.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants explore the relationship between the currents and question how to properly sum them, with references to the conservation of charge and the sign conventions for currents at a junction.

Discussion Status

Some participants have provided reassurance regarding the approach to calculating I5, while others emphasize the importance of sign conventions in the context of current flow. There appears to be a mix of interpretations regarding the signs of the currents involved.

Contextual Notes

There is a mention of rules regarding the signs of currents entering and leaving a vertex, which may influence the calculations and assumptions being discussed.

Matty9879
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What is I5 I think its I3-I4+I2+I1 but not surehow to add em up any tips?

thanks
 

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Yes,it is correct.Electric charge is conserved.With the regular choise of signs,the I_{5} should be -12A.

Daniel.
 
Matty9879 said:
What is I5 I think its I3-I4+I2+I1 but not surehow to add em up any tips?
Think of current as water flow. The current at a point is the sum of all currents entering at that point minus all currents leaving that point. Your answer is correct.

AM
 
Thanks for the reassurance but by the way it wasnt neative
 
It had to be.That's the rule.All currents entering a vertex are positive,while all which are leaving are negative.

Daniel.
 

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