Page 138 - Basic Electrical Engineering

The total current I due to 12 V supply has been calculated as This current

gets divided into I and I as has been shown in Fig. 2.32 (a). Current I is
2
1
1
calculated using the current division rule as

To determine the current flowing through the resistor across BD, the

combined effect of the two voltage sources will be taken. Therefore,

I BD = I due to 24 V source + I due to the 12 V source
1
1

flowing from node B towards node D

Example 2.12 For the circuit shown in Fig. 2.32, calculate the current, I
using the superposition theorem.

Figure 2.33

Solution:

We will consider the 75 V source first and short circuit the 64 V source. The
current supplied by the 75 V source will be calculated. From the total current,

current flowing through the resistor across terminals A and B will be
calculated. The steps are illustrated in Fig. 2.34. When 64 V is short
circuited, the 12 Ω and 4 Ω resistors get connected in parallel.