Kirchhoff’s Current Law (KCL)

This tutorial introduces Kirchhoff’s current law (KCL). Kirchhoff’s current law states that the algebraic sum of current flowing into and out of a node (or wire junction) is zero. When writing an expression for this conservation of charge entering and exiting the node, we can either write current in = current out, or pick one direction to be positive and the other to be negative, and sum up the current in all branches to zero. It's nice to pick current flowing in as negative, and current flowing out as positive, and draw unknown currents as flowing out. If you find the current to be positive, then it is truly flowing out, but if it's negative, then it just means it's actually flowing into the junction.

This video is part of a full free course on electric circuits. The course covers DC circuits, circuit laws, current & voltage sources, series & parallel resistors, nodal analysis, mesh analysis, and AC circuits. Links to the course are here:

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Thanks for watching, I hope it helps!

[Devansh-nuqw]

Can anybody tell me if this Circuits series is complete, or is it still underway. I have a class test on Monday from D.C. Circuits and I'd highly appreciate it.

[adude]

Currently learning about this. Weirdly relevant upload timing

[lgl_noname]

a repost ?
Did I miss an error in the prior post ?

[StuartEverley-pu]

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