72 71 The figure shows an \"autotransformer\". It consists of a single coil (wit

Question

72 71 The figure shows an "autotransformer". It consists of a single coil (with an iron core). Three taps T, are provided. Between taps T, and T2 there are 390 turns, and between taps T2 and T3 there are s00 turns. Any two taps can be chosen as the primary terminals and any two taps can be chosen as the secondary terminals. For choices producing a step-up transformer what is the smallest value of the ratio V V Submit Answer Tries 0/100 For choices producing a step-up transformer what is the second smallest value of the ratio V/Vp? Submit Answer Tries 0/100 For choices producing a step-up transformer what is the largest value of the ratio V/Vp? Submit Answer Tries o/100 For choices producing a step-down transformer what is the smallest value of the ratio v./Vp? Submit Answer Tries 0/100 For choices producing a step-down transformer what is the second smallest value of the ratio V:/Vp? Submit Answer Tries 0/100 For choices producing a step-down transformer what is the largest value of the ratio Vp

Explanation / Answer

No. of turns between T1 and T2 = 390

No. of turns between T2 and T3 = 800

(a) For step-up transformer –

Smallest value of Vs / Vp = (800+390) / 800 = 1190/800 = 1.49

(b) Second smallest value of Vs / Vp = 800 / 390 = 2.05

(c) Largest value of Vs / Vp = (800+390) / 390 = 1190/390 = 3.05

For step –down transformer –

(d) Smallest value of Vs / Vp = 390 /( 800 + 390) = 390 / 1190 = 0.33

(e) Second smallest value of Vs / Vp = 390 / 800 = 0.49

(f) Largest value of Vs / Vp = 800 / (800 + 390) = 800 / 1190 = 0.67

Related Questions

Navigate

• Browse (All)
• Browse 7
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.