In electrical engineering, superposition is a fundamental principle that applies to linear systems. It states that in a linear circuit with multiple sources, the individual effects of each source be analyzed separately and then superimposed to find the total response.

This means that if a circuit has multiple independent sources, the effect of each source can be determined by considering it alone and turning off all other sources (replacing voltage sources with short circuits and current sources with open circuits). The total response can then be found by summing the individual responses due to each source.

It's a powerful tool for simplifying the analysis of complex circuits, allowing engineers to break down the problem into more manageable parts and then combine the results to find the overall behavior of the circuit.

Superposition is a concept that is widely used in circuit analysis and design, and it forms the basis for many important techniques in electrical engineering.