Friday, July 27, 2018

Kirchhoff's current & voltage law

you can see kirchhoff's current and voltege laws in below.


 First Law (KCL: Kirchhoff’s Current Law):-
                “The sum of the currents entering a junction is equal to the sum of the currents leaving the junction.”
i.e.,                              sum of currents entering = sum of currents leaving

(Figure for KCL)

i1 -i2 +i3 -i4 -i5 =0

i1+i3 = i2+i4+i5


                                          Second Law (KVL: Kirchhoff’s Voltage Law):-
“The sum of e.m.f. (rise of potential) around any closed loop of a circuit equals the sum of the potential drops in that loop”.
i.e.,                              sum of e.m.f – sum of IR drops =0
                                    sum of e.m.f. =sum of IR drops

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