logo

CuriousTab

CuriousTab

Discussion

Home ‣ Electrical Engineering ‣ Transformers See What Others Are Saying!
  • Question

  • The primary winding of a transformer has 110 V ac across it. What is the secondary voltage if the turns ratio is 8?


  • Options
  • A. 8.8 V
  • B. 88 V
  • C. 880 V
  • D. 8,800 V

  • Correct Answer
  • 880 V 

    Explanation
    V2/V1 = N2/N1

    Turns ratio = N2/N1 = 8.

    V2/110 = 8

    V2 = 8 x 110

    V2 = 880v.

    More questions

    • 1. The induced voltage across a coil with 250 turns that is located in a magnetic field that is changing at a rate of 8 Wb/s is

    • Options
    • A. 1,000 V
    • B. 2,000 V
    • C. 31.25 V
    • D. 3,125 V
      • Discuss
    • 2. A 10 Ω resistor, a 90 mH coil, and a 0.015 µF capacitor are in series across an ac source. The impedance magnitude at 1,200 Hz below fr is

    • Options
    • A. 1,616 Ω
    • B. 161 Ω
    • C. 3,387 Ω
    • D. 1,771 Ω
      • Discuss
    • 3. Approximately how much current flows through a 3.3 MΩ resistor across a 30 V source?

    • Options
    • A. 9 µA
    • B. 90 µA
    • C. 900 µA
    • D. 9000 µA
      • Discuss
    • 4. In a certain transformer, the input power to the primary is 120 W. If 8.5 W are lost to the winding resistance, what is the output power to the load, neglecting any other issues?

    • Options
    • A. 0 W
    • B. 14.1 W
    • C. 111.5 W
    • D. 1,020 W
      • Discuss
    • 5. A balanced load is one in which all the impedances are equal.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. A 470 Ω resistor, a 220 Ω resistor, and a 100 Ω resistor are all in parallel. The total resistance is approximately

    • Options
    • A. 790 Ω
    • B. 470 Ω
    • C. 60 Ω
    • D. 30 Ω
      • Discuss
    • 7. What kVA rating is required for a transformer that must handle a maximum load current of 8 A with a secondary voltage of 2 kV?

    • Options
    • A. 4 kVA
    • B. 0.25 kVA
    • C. 16 kVA
    • D. 8 kVA
      • Discuss
    • 8. In a series RLC circuit, the current is minimum at resonance.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. In a series circuit, the individual powers are additive.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. If the voltage is stepped up, the current is stepped down, and vice versa.

    • Options
    • A. True
    • B. False
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.