Kirchhoff’s current law

symbols, variables and units

I_k: A; inflow and outflow must have opposite signs.

applicable conditions and boundaries

The lumped circuit is approximated by no accumulation of node charge; the high-frequency distribution effect is separately accounted for.

formula source code

The following is a copyable LaTeX expression.

\sum_k I_k=0

Reference and Extended Learning

is organized according to model definition and assumptions. Please check actual conditions and original literature before engineering, research and clinical use.