Kirchhoff's Current Law, Junction Rule, KCl Circuits - Physics Problems

This physics video tutorial provides a basic introduction into kirchoff's current law or junction rule. It explains how to calculate the missing current flowing into or out of a junction. A current flowing into the junction is given a positive sign and a current flowing out of a junction is given a negative sign. This video contains plenty of examples and practice problems on kirchoff's junction rule for KCl circuits.
Schematic Diagrams & Symbols:
• Schematic Diagrams & S...
Resistors In Series:
• Resistors In Series - ...
Resistors In Parallel:
• Resistors In Parallel ...
Series and Parallel Circuits - Light Bulb Brightness:
• Series and Parallel Ci...
Equivalent Resistance of Complex Circuits:
• Equivalent Resistance ...
How To Solve DC Circuits:
• How To Solve Any Resis...
_________________________
Voltage Divider Circuit:
• Voltage Divider Circui...
Current Dividers:
• Current Dividers Expla...
Parallel Circuit Challenge Problem:
• Finding The Current In...
Kirchhoff's Voltage Law:
• Kirchhoff's Voltage La...
DC Circuits Review:
• Series and Parallel Ci...
____________________________
KCL and KVL Circuit Analysis:
• Kirchhoff's Law, Junct...
Thevenin's Theorem - Circuit Analysis:
• Thevenin's Theorem - C...
Norton's Theorem - Circuit Analysis:
• Norton's Theorem and T...
Superposition Theorem:
• Superposition Theorem
Maximum Power Transfer:
• Maximum Power Transfer...
Physics PDF Worksheets:
www.video-tutor.net/physics-b...

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8:50
Is "I4 = 2(I3)" just an arbitrary solution or does it follow an underlying principle?
Because I tried "I4 = 3(I3)" and I only got -6A for the value of I3 while you got "I3 = -8A"
What is the explanation for saying tht I4 is twice the magnitude of I3? Or is it part of the given / problem?
Thank you!

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in the last example given,why is I4 twice of I3?

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Hello I have a question
How is i4 equal to 2i3
Can someone please explain🙏🏽

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[@paulwalsh5458]

I had the understanding the current supplying the node (is) is of a negative value? As in i1 is -10amps? with i2 and i3 being
+4amps +6amps? The source always being negative..

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[@idk-dr7fo]

thanks this seems pretty easy 4jan2022 7:36 pm

[@Kencan254]

@7.04, shouldn't the be +8A?

[@arvindalramustudent7413]

@The Organic Chemistry Tutor What if there has a negative current but the current flowing towards the juction. Pls exlain

[@azyle2104]

Then I guess the current flowing out would be positive in that case

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Then, it should be leave the junction

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I don’t understand why it would be a negative value if it’s leaving the junction? Majority of other tutors assign both as a positive value

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How i4=2i3?

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potassium chloride

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What about experimenting with KCL in real time? check this out: dcaclab.com/en/experiments/14126-circuit-analysis-using-kirchhoff-current-law

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