Superposition theorem statement Definition

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Superposition theorem statement Definition

Superposition theorem states that in any linear network the overall final response in any branch of bilateral network can be found by adding the individual responses produced in the branch by individual independent sources acting alone at a time.

The meaning of above statement clearly indicates that the in the electrical circuit the response in particular branch is needed to be calculated. There can be more than two electrical sources present in the circuit. 

What will be the effect of these individual sources on the branch where response has to be calculated? 

To check this we let only one source connected to the circuit and another sources are replaced. Once one source is acting, we calculate the response in the branch because of this source
Next we remove this source and connect another source back that was removed earlier. Now the response in the branch is calculated because of this source.

Now when you have calculated individual responses because of the two individual sources, sum these different effects to get the resultant. If the two responses are opposite, subtract them. If the two responses are in the same polarity add them.

Superposition theorem solving steps are discussed in my other article post, where I have described superposition theorem circuit solving steps. By reading that post you will be able to understand superposition theorem in more detail.

Steps to remove sources when applying superposition theorem

  1. Voltage sources are always short circuited when to be eliminated.
  2. Current sources are open circuited for the same.
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