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Basic Circuit Laws

Updated: Apr 6, 2021

This note was taken while reading from the Basic Circuit Theory (Third Edition) textbook and reviewing my own past notes. This post is very brief, so if you need more information use the hyperlinks.


In electronics there are three main laws that everyone must know:

 

Ohm's Law


The voltage across any conductive material is directly proportional to the current flowing through it.


Formula


For more on Ohm's Law use this hyperlink.



 

Kirchhoff's Current Law


The algebraic sum of currents entering any node is zero (0). A charge cannot accumulate at a node.


Formula


For more on either of Kirchhoff's Laws use this hyperlink.



Kirchoff's Voltage Law


The algebraic sum of voltages around any closed path is zero (0).


Formula




For more on either of Kirchhoff's Laws use this hyperlink.


Comparison of the three laws




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