logo

CuriousTab

CuriousTab

Discussion

Home ‣ Electronics ‣ Inductors Comments
  • Question

  • The electrical energy consumed by a coil is stored in the form of:


  • Options
  • A. an electrical field
  • B. a force field
  • C. an electrostatic field
  • D. a magnetic field

  • Correct Answer
  • a magnetic field 

    • Inductors problems

    Search Results

    • 1. What is the current rise after 2 time constants if Vs = 12 V dc, R = 60 Ω, and the inductor is rated at 24 mH?

    • Options
    • A. 79.9 mA
    • B. 126.4 mA
    • C. 173.0 mA
    • D. 198.6 mA
      • Discuss
    • 2. 

      In the given circuit, what will the voltage be across R3 25 µs after the switch is moved to position 2?


    • Options
    • A. 2.88 V
    • B. 5.9 V
    • C. 8.34 V
    • D. 14 V
      • Discuss
    • 3. In a transformer, what will happen to the primary current if the secondary magnetic field increases?

    • Options
    • A. Ip will increase.
    • B. Ip will be canceled.
    • C. Ip will remain the same.
    • D. Ip will decrease.
      • Discuss
    • 4. How long until the current is at a maximum?


    • Options
    • A. 0 µs
    • B. 5 µs
    • C. 15 µs
    • D. 25 µs
      • Discuss
    • 5. In a purely inductive circuit,

    • Options
    • A. current leads voltage by 90°
    • B. voltage lags current by 90°
    • C. voltage leads current by 90°
    • D. voltage and current are in phase (0°)
      • Discuss
    • 6. When the transformer secondary is not loaded:

    • Options
    • A. secondary voltage increases
    • B. no secondary current flows
    • C. no secondary voltage is present
    • D. secondary current increases
      • Discuss
    • 7. The output phase for a transformer is:

    • Options
    • A. in phase with the input
    • B. out of phase with the input
    • C. dependent on the direction of the primary and secondary windings
    • D. dependent on the frequency of the primary source
      • Discuss
    • 8. A practical inductor

    • Options
    • A. has inductance
    • B. has winding resistance
    • C. has winding capacitance
    • D. all of the above
      • Discuss
    • 9. Which transformer turns ratio is needed to match two 16-ohm parallel devices to an output of 22.2 ohms?

    • Options
    • A. 1.38:1
    • B. 1.67:1
    • C. 0.72:1
    • D. 0.60:1
      • Discuss
    • 10. When current in an inductor starts to change, it cannot react instantly due to:

    • Options
    • A. fixed coil resistance
    • B. eddy current generation
    • C. applied emf of the circuit
    • D. the counter emf of the coil
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.