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13.1 Refer to the two magnetically coupled coils of Fig. 13.69(a). The polarity of the mutual voltage is: (a) Positive (b) Negative (a) Figure 13.69 For Review Questions 13.1 and 13.2. 13.2 For the two magnetically coupled coils of Fig. 13.69(b), the polarity of the mutual voltage is: (a) Positive (b) Negative 13.3 The coefficient of coupling for two coils having L = 2 H, L2 = 8 H, M = 3 H is: (a) 0.1875 (b) 0.75 (c) 1.333 (d) 5.333

13.1 Refer to the two magnetically coupled coils of Fig. 13.69(a). The polarity of the mutual voltage is: (a) Positive (b) Negative (a) Figure 13.69 For Review Questions 13.1 and 13.2. 13.2 For the two magnetically coupled coils of Fig. 13.69(b), the polarity of the mutual voltage is: (a) Positive (b) Negative 13.3 The coefficient of coupling for two coils having L = 2 H, L2 = 8 H, M = 3 H is: (a) 0.1875 (b) 0.75 (c) 1.333 (d) 5.333

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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598 Chapter 13 Magnetically Coupled Circuits Review Questions 13.1 Refer to the two magnetically coupled coils of Fig. 13.69(a). The polarity of the mutual voltage is: 13.6 For the ideal transformer in Fig. 13.70(b), Na/N, = 10. The ratio I/1, is: (a) Positive (b) Negative (a) 10 (b) 0.1 (c) -0.1 (d) – 10 13.7 A three-winding transformer is connected as portrayed in Fig. 13.71(a). The value of the output voltage V, is: M M (a) 10 (b) 6 (c) -6 (d) - 10 (a) (b) Figure 13.69 For Review Questions 13.1 and 13.2. E2 V 2V 50 V 50 V 8 V E8 V 13.2 For the two magnetically coupled coils of Fig. 13.69(b), the polarity of the mutual voltage is: (a) (b) Figure 13.71 For Review Questions 13.7 and 13.8. (a) Positive (b) Negative 13.3 The coefficient of coupling for two coils having L = 2 H, L2 = 8 H, M = 3 H is: : 13.8 If the three-winding transformer is connected as in Fig. 13.71(b), the value of the output voltage V, is: (a) 0.1875 (b) 0.75 (c) 1.333 (d) 5.333 (a) 10 (b) 6 (c) -6 (d) - 10 13.4 A transformer is used in stepping down or stepping up: 13.9 In order to match a source with intermal impedance of 500 N to a 15-N load, what is needed is: (a) de voltages (b) ac voltages (c) both de and ac voltages (a) step-up linear transformer (b) step-down linear transformer (c) step-up ideal transformer 13.5 The ideal transformer in Fig. 13.70(a) has N2/N = 10. The ratio V2/V, is: (d) step-down ideal transformer (e) autotransformer (a) 10 (b) 0.1 (c) -0.1 (d) – 10 13.10 Which of these transformers can be used as an N:N2 N:N isolation device? (a) linear transformer (b) ideal transformer (c) autotransformer (d) all of the above (a) (b) Answers: 13.1b, 13.2a, 13.3b, 13.4b, 13.5d, 13.6b, Figure 13.70 For Review Questions 13.5 and 13.6. 13.7c, 13.8a, 13.9d, 13,10b.
Transcribed Image Text:598 Chapter 13 Magnetically Coupled Circuits Review Questions 13.1 Refer to the two magnetically coupled coils of Fig. 13.69(a). The polarity of the mutual voltage is: 13.6 For the ideal transformer in Fig. 13.70(b), Na/N, = 10. The ratio I/1, is: (a) Positive (b) Negative (a) 10 (b) 0.1 (c) -0.1 (d) – 10 13.7 A three-winding transformer is connected as portrayed in Fig. 13.71(a). The value of the output voltage V, is: M M (a) 10 (b) 6 (c) -6 (d) - 10 (a) (b) Figure 13.69 For Review Questions 13.1 and 13.2. E2 V 2V 50 V 50 V 8 V E8 V 13.2 For the two magnetically coupled coils of Fig. 13.69(b), the polarity of the mutual voltage is: (a) (b) Figure 13.71 For Review Questions 13.7 and 13.8. (a) Positive (b) Negative 13.3 The coefficient of coupling for two coils having L = 2 H, L2 = 8 H, M = 3 H is: : 13.8 If the three-winding transformer is connected as in Fig. 13.71(b), the value of the output voltage V, is: (a) 0.1875 (b) 0.75 (c) 1.333 (d) 5.333 (a) 10 (b) 6 (c) -6 (d) - 10 13.4 A transformer is used in stepping down or stepping up: 13.9 In order to match a source with intermal impedance of 500 N to a 15-N load, what is needed is: (a) de voltages (b) ac voltages (c) both de and ac voltages (a) step-up linear transformer (b) step-down linear transformer (c) step-up ideal transformer 13.5 The ideal transformer in Fig. 13.70(a) has N2/N = 10. The ratio V2/V, is: (d) step-down ideal transformer (e) autotransformer (a) 10 (b) 0.1 (c) -0.1 (d) – 10 13.10 Which of these transformers can be used as an N:N2 N:N isolation device? (a) linear transformer (b) ideal transformer (c) autotransformer (d) all of the above (a) (b) Answers: 13.1b, 13.2a, 13.3b, 13.4b, 13.5d, 13.6b, Figure 13.70 For Review Questions 13.5 and 13.6. 13.7c, 13.8a, 13.9d, 13,10b.
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