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14.40

MUTUAL INDUCTANCE AND TRANSFORMERS

[CHAP. 14

Obtain The´venin and Norton equivalent circuits at terminals ab of the coupled circuit shown in Fig. 14-50. Ans: V 0 ¼ 7:07 458 V; I 0 ¼ 1:04 27:98 A; Z 0 ¼ 6:80 72:98 

Fig. 14-50

14.41

For the ideal transformer shown in Fig. 14-51, find I1 , given IL1 ¼ 10:0 08 A Ans:

IL2 ¼ 10:0 36:878 A

IL3 ¼ 4:47 26:578 A

16:5 14:048 A

Fig. 14-51

14.42

When the secondary of the linear transformer shown in Fig. 14-52 is open-circulated, the primary current is I1 ¼ 4:0 89:698 A. Find the coefficient of coupling k. Ans: 0:983

Fig. 14-52 14.43

For the ideal transformer shown in Fig. 14-53, find I1 , given I2 ¼ 50 36:878 A and I3 ¼ 16 08 A. Ans: 26:6 34:298 A

14.44

Considering the autotransformer shown in Fig. 14-54 ideal, obtain the currents I1 , Icb , and Idc . Ans: 3:70 22:58 A; 2:12 86:718 A; 10:34 11:838 A

Mahmood_Nahvi_eBook_Schaum_s_Outlines_Theory_An  
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