Explain the Kirchhoff's Junction rule.
OR.
What is Kirchhoff's junction rule?

Explanation

### Step-by-Step Solution:

1. **Definition of Kirchhoff's Junction Rule**:
Kirchhoff's Junction Rule, also known as Kirchhoff's Current Law (KCL), states that the algebraic sum of currents entering a junction (or node) in an electrical circuit is equal to the algebraic sum of currents leaving the junction. This is based on the principle of conservation of electric charge.

2. **Mathematical Representation**:
If we denote the currents entering the junction as positive and the currents leaving the junction as negative, the rule can be mathematically expressed as:
\[
...