Kirchhoff’s Current Law (KCL)
KCL defines that at any node (or junction) in a circuit the algebraic sum of currents entering and leaving a node at any instant of time should be equivalent to zero. Here currents entering (+ve sign) and currents leaving (-ve sign) the node should be assigned opposite algebraic signs (as shown in figure (a),
I1-I2 + I3-I4 + I5-I6 = 0
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Figure: Kirchhoff’s current law