Kirchhoff's Law


An electric doesn’t always have a single resistor or other electrical component in it, nor is the connection pattern always uniform. There can be a parallel or series connection at times or sometimes both. There can be multiple types of components attached to each other in an circuit. This leads to a problem of calculating the current and voltages across each component.


  • 1.    Junction rule: At any junction, the sum of the currents entering the junction is equal to the sum of currents leaving the junction

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eg In above circuit, Incoming current is I1, Outgoing Currents are I2 and I3.

AsAs per Kirchhoff's Junction law, I1 = I2 + I3


  • 2.    Loop rule: The algebraic sum of changes in potential around any closed loop involving resistors and cells in the loop is zero 

   




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