Question

What is Kirchhoff’s First Law for the electrical circuit?

Hint:

Kirchhoff’s First Law is based on conservation of charge.

Answer 1

Step 1: Recall Kirchhoff’s current law (KCL).
At any junction in an electric circuit, the total current entering is equal to the total current leaving.
Step 2: Mathematical expression.
\[ \sum I_{\text{in}} = \sum I_{\text{out}} \quad \Rightarrow \quad \sum I = 0. \]
Step 3: Conclusion.
This is Kirchhoff’s First Law.