Page 170 - Basic Electrical Engineering

Example 2.28 Calculate using Thevenin’s theorem the current flowing
through the 5 Ω resistor connected across the terminals A and B as shown.

Figure 2.71

Solution:

Remove the load resistance of 5 Ω connected between the terminals A and B

as shown.
The equivalent resistance across terminals A and B is calculated by short

circuiting the voltage source and open circuiting the current source. The
equivalent resistance will be equal to 3 Ω plus the parallel combination of 2

Ω and 3 Ω resistors. This comes to equal to 4.33 Ω.

Figure 2.72

Now we will convert the current source into an equivalent voltage source.