60

4.30

ANALYSIS METHODS

[CHAP. 4

In the network shown in Fig. 4-43 the two current sources provide I 0 and I 00 where I 0 þ I 00 ¼ I. superposition to obtain these currents. Ans. 1.2 A, 15.0 A, 16.2 A

Use

Fig. 4-43

4.31

Obtain the current I in the network shown in Fig. 4.44.

Ans:

 12 A

Fig. 4-44 Fig. 4-45

4.32

Obtain the The´venin and Norton equivalents for the network shown in Fig. 4.45. Ans: V 0 ¼ 30 V; I 0 ¼ 5 A; R 0 ¼ 6 

4.33

Find the maximum power that the active network to the left of terminals ab can deliver to the adjustable resistor R in Fig. 4-46. Ans. 8.44 W

Fig. 4-46 4.34

Under no-load condition a dc generator has a terminal voltage of 120 V. When delivering its rated current of 40 A, the terminal voltage drops to 112 V. Find the The´venin and Norton equivalents. Ans: V 0 ¼ 120 V; I 0 ¼ 600 A; R 0 ¼ 0:2 

4.35

The network of Problem 4.14 has been redrawn in Fig. 4-47 and terminals a and b added. Reduce the network to the left of terminals ab by a The´venin or Norton equivalent circuit and solve for the current I. Ans:  8:77 A

Mahmood_Nahvi_eBook_Schaum_s_Outlines_Theory_An
Mahmood_Nahvi_eBook_Schaum_s_Outlines_Theory_An
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