logo

CuriousTab

CuriousTab

Discussion


Home Electrical Engineering Transformers Comments

  • Question
  • 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

  • Correct Answer
  • 111.5 W 


  • Transformers problems


    Search Results


    • 1. The primary of a transformer is connected to a 6 V battery. The turns ratio is 1:3 and the secondary load, RL, is 100 Ω. The voltage across the load is

    • Options
    • A. 0 V
    • B. 6 V
    • C. 18 V
    • D. 2 V
    • Discuss
    • 2. A certain transformer has a turns ratio of 1 and a 0.85 coefficient of coupling. When 2 V ac is applied to the primary, the secondary voltage is

    • Options
    • A. 1.7 V
    • B. 0.85 V
    • C. 1 V
    • D. 0 V
    • Discuss
    • 3. A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is

    • Options
    • A. 0.2
    • B. 0.4
    • C. 5
    • D. 25
    • Discuss
    • 4. How many primary volts must be applied to a transformer with a turns ratio of 0.1 to obtain a secondary voltage of 9 V?

    • Options
    • A. 9 V
    • B. 90 V
    • C. 900 V
    • D. 0.9 V
    • Discuss
    • 5. The primary coil of a transformer is connected to a 60 V ac source. The secondary coil is connected to a 330 Ω load. The turns ratio is 3:1. What is the secondary voltage?

    • Options
    • A. 2 V
    • B. 20 V
    • C. 180 V
    • D. 18 V
    • Discuss
    • 6. A transformer with a 110 V primary has a 15:1 turns ratio. The load resistance, RL, is 120 Ω. What is the approximate voltage across the load?

    • Options
    • A. 7.3 V
    • B. 73 V
    • C. 88 V
    • D. 880 V
    • Discuss
    • 7. If 25 W of power are applied to the primary of an ideal transformer with a turns ratio of 10, the power delivered to the secondary load is

    • Options
    • A. 25 W
    • B. 0 W
    • C. 250 W
    • D. 2.5 W
    • Discuss
    • 8. When a 6 V battery is connected across the primary of a transformer with a turns ratio of 8, the secondary voltage is

    • Options
    • A. 0 V
    • B. 6 V
    • C. 48 V
    • D. 0.75 V
    • Discuss
    • 9. A transformer has a 1:6 turns ratio and a secondary coil load resistance of 470 Ω. The load resistance as seen by the source is

    • Options
    • A. 1.3 Ω
    • B. 7.8 Ω
    • C. 78 Ω
    • D. 13 Ω
    • Discuss
    • 10. When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is

    • Options
    • A. 12 V
    • B. 120 V
    • C. 240 V
    • D. 2,400 V
    • Discuss


    Comments

    There are no comments.

Enter a new Comment