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

  • An autotransformer is one in which the primary and secondary are automatically coupled.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • False 

    • More questions

    • 1. Positive numbers can be represented by points to the right of the origin on the horizontal axis of a graph.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. A series circuit consists of three resistors with values of 120 Ω, 270 Ω, and 330 Ω. The total resistance is

    • Options
    • A. less than 120 Ω
    • B. the average of the values
    • C. 720 Ω
    • D. 120 Ω
      • Discuss
    • 3. The dielectric constant is the ability of a material to establish an electric field.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. Two 1.2 kΩ resistors are in series and this series combination is in parallel with a 3.3 kΩ resistor. The total resistance is

    • Options
    • A. 138 Ω
    • B. 1,389 Ω
    • C. 5,700 Ω
    • D. 880 Ω
      • Discuss
    • 5. A series resonant circuit is commonly called a tank circuit.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. A 47 Ω resistor is in series with an inductive reactance of 120 Ω across an ac source. The impedance, expressed in polar form, is

    • Options
    • A. 47∠68.6° Ω
    • B. 120∠68.6° Ω
    • C. 129∠31.4° Ω
    • D. 129∠68.6° Ω
      • Discuss
    • 7. When a 12 V input pulse with a width equal to one time constant is applied to an RC integrator, the capacitor charges to

    • Options
    • A. 0 V
    • B. 12 V
    • C. 6.3 V
    • D. 7.56 V
      • Discuss
    • 8. An integrator consists of a 3.3 kΩ resistor and a 2 µF capacitor. A single 30 V, 6 ms pulse is applied to the input. How much will the capacitor charge?

    • Options
    • A. 10.3 V
    • B. 30 V
    • C. 12.09 V
    • D. 17.91 V
      • Discuss
    • 9. Two 3.3 kΩ resistors are in series and this series combination is in parallel with a 4.7 kΩ resistor. The voltage across one of the 3.3 kΩ resistors is 12 V. The voltage across the 4.7 kΩ resistor is

    • Options
    • A. 24 V
    • B. 12 V
    • C. 0 V
    • D. 6 V
      • Discuss
    • 10. An inductor and a resistor are in series with a sine wave voltage source. The frequency is set so that the inductive reactance is equal to the resistance. If the frequency is increased, then

    • Options
    • A. VR ? VL
    • B. VL < VR
    • C. VL = VR
    • D. VL > VR
      • Discuss

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