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Home ‣ Electronics ‣ Transformers Comments
  • Question

  • An open secondary winding of a transformer will cause the primary current to be nearly zero.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • True 

    • Transformers problems

    Search Results

    • 1. The secondary voltages produced by a center-tapped transformer are equal in amplitude but 180° out of phase with respect to the center tap.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. If the current drawn in the secondary of a transformer increases, the power in the primary should remain the same.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. The reflected load value that the source sees will always be larger than the load value itself.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. Regardless of whether the transformer is step-up or step-down, power in the primary equals the power in the secondary if there is 100% efficiency.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. 

      In the given circuit, the secondary voltage is in phase with the primary voltage.


    • Options
    • A. True
    • B. False
      • Discuss
    • 6. If voltage is stepped-up to the secondary, current will be stepped-down by the same amount.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. A transformer that has 700 turns in the primary and 35 turns in the secondary has a turns ratio of 20:1.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. 

      In the given circuit, Maximum power is being transferred to the load.


    • Options
    • A. True
    • B. False
      • Discuss
    • 9. For mutual inductance to occur, the two coils must be at right angles to each other.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. A transformer turns ratio of ________ will be needed to match an output impedance of 5 kΩ to an 8 Ω speaker.

    • Options
    • A. 5:1
    • B. 8:1
    • C. 25:1
    • D. 625:1
      • Discuss

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