superposition

superposition

The principle of superposition states that the response (a desired current or voltage) in a linear circuit having more than one independent source can be obtained by adding the responses caused by the separate independent sources acting alone.
remember that:

sample problem

If superposition of the controlled source is not used, two solutions must be found. Let i = ia+ib, where ia

is the current with the 7A source zeroed and ib is the current with the 24V source zeroed. By superposition,

we can write

This is the same answer obtained by using superposition of the controlled source.