Page 221 - Basic Electrical Engineering

This is a simple series and parallel connection of resistors. The circuit is
redrawn as

Figure 2.142

The equivalent resistance is calculated as 7.5 Ω.

Example 2.42 Calculate the total current supplied by the battery in the

network shown in Fig. 2.143. All resistances shown are in Ohms.

Figure 2.143

Solution:

The circuit is redrawn as shown in Fig. 2.144 after adding two series
resistors. The three resistors of 5 Ω each forming a delta across terminals A,
B, and C is converted into equivalent star across three terminals and then the

circuit is further simplified through series and parallel operations as shown in
Fig. 2.145.