Page 136 - Basic Electrical Engineering

with all the other sources replaced by their respective internal resistances. In
case the internal resistance of a source is not provided, the voltage sources
will be short circuited and current sources will be open circuited.

The procedure for solving circuit problems using the above stated
superposition theorem is illustrated through a few examples.

Example 2.11 Using the superposition theorem find the value of current,
I BD in the circuit shown in Fig. 2.31.

Figure 2.31

Solution:

We shall consider each source separately and calculate the current flowing
through the branch BD. First the 24 V source is taken by short circuiting the

12 V source as shown in Fig. 2.32.