Kirchhof’s Current law



Kirchhof’s Current law:

It states that, “The algebraic sum of all the currents entering into the loop and leaving the loop must be equal to zero.”
Derivation of KCl

Using the equation of continuity,

 ▽.J + ∂९/∂t = 0
 ▽.J = -∂९/∂t
∫▽.J dv = -∫∂९/∂t  dv
∮ J.ds = - ∂/∂t ∫९ dv
i = -∂/∂t Q 
I.e.   ΣI=0