Superposition theorem is a principle used to analyze linear circuits, which states that the response (voltage or current) at any point in a linear circuit can be found by adding the responses caused by each individual source acting alone, while all other sources are turned off.
In other words, when there are multiple voltage or current sources in a circuit, the superposition theorem allows us to analyze the circuit by considering the effect of each source separately, with all other sources turned off (replaced by their internal resistances).
This is a useful technique for simplifying the analysis of complex circuits, as it allows us to break down a complex circuit into simpler parts, and then recombine the results to determine the overall response of the circuit. However, it is only applicable to linear circuits, where the response is proportional to the input signal.
The superposition theorem can be applied to both DC and AC circuits, and is commonly used in electronic design, power systems, and telecommunications.
