Is Kirchhoff's first law true regarding the sum of currents at a junction?

Kirchhoff's first law, also known as the current law or Kirchhoff's current law (KCL), states that the sum of currents entering a junction must equal the sum of currents leaving that junction. This law is grounded in the conservation of electric charge, which asserts that charge cannot be created or destroyed in an isolated system. Therefore, at any junction in an electrical circuit where multiple conductors meet, the total current flowing into the junction must be balanced by the total current flowing out.

This principle applies universally to all electrical circuits, regardless of configuration, as long as the circuit conditions adhere to fundamental electrical principles, such as steady-state conditions where currents are constant over time. As a result, the assertion that Kirchhoff's first law is true regarding the sum of currents at a junction is fully valid and consistent with the established laws of physics.