Question

Kirchhoff's current law is valid for:

• A. DC circuit only
• B. AC circuit only
• C. Both DC and AC circuits
• D. Sinusoidal source only

Hint:

Kirchhoff's laws are fundamental and apply to both DC and AC circuits, ensuring charge conservation in both types of current flow.

Answer 1

The Correct Option is C

Kirchhoff's current law (KCL) states that the algebraic sum of currents entering and leaving a junction in an electrical circuit is zero. This law is based on the principle of charge conservation, which is valid for both direct current (DC) and alternating current (AC) circuits.
- For DC circuits, KCL is applied to steady-state currents.
- For AC circuits, KCL holds true at all frequencies, as it still relies on the conservation of charge, regardless of whether the current is constant or varying sinusoidally.
Thus, Kirchhoff's current law is valid for both DC and AC circuits.