logo

CuriousTab

CuriousTab

Discussion

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

  • A step-up transformer steps up power.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • False 

    • More questions

    • 1. A relay is an electromagnetically controlled mechanical device in which electrical contacts are opened or closed by a magnetizing current.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. Which of the following series combinations dissipates the most power when connected across a 120 V source?

    • Options
    • A. one 220 Ω resistor
    • B. two 220 Ω resistors
    • C. three 220 Ω resistors
    • D. four 220 Ω resistors
      • Discuss
    • 3. A band-stop filter passes frequencies between its lower and upper critical frequencies and rejects all others.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. For the circuit given, determine the Thevenin voltage as seen by RL.


    • Options
    • A. 0.574∠16.7° V
    • B. 5.74∠16.7° V
    • C. 0.574 ∠?16.7° V
    • D. 5.74∠?16.7° V
      • Discuss
    • 5. If two currents are in the same direction at any instant of time in a given branch of a circuit, the net current at that instant

    • Options
    • A. is zero
    • B. is the sum of the two currents
    • C. is the difference between the two currents
    • D. cannot be determined
      • Discuss
    • 6. A series resonant band-stop filter consists of a 68 Ω resistor, a 110 mH coil, and a 0.02 µF capacitor. The internal resistance, RW, of the coil is 4 Ω. Input voltage is 200 mV. Output voltage is taken across the coil and capacitor in series. What is the output voltage magnitude at f0?

    • Options
    • A. 1.1 mV
    • B. 11.1 mV
    • C. 111 mV
    • D. 200 mV
      • Discuss
    • 7. Materials with a low retentivity do not retain a magnetic field very well.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. Referring to the given circuit, L


    • Options
    • A. must be in parallel with RL
    • B. must be placed in parallel with VS
    • C. must have a reactance equal to XC
    • D. has no effect on the result
      • Discuss
    • 9. Reluctance in a magnetic circuit is analogous to current in an electrical circuit.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. A simple two-phase generator consists of two conductive loops separated by 90°, rotating in a magnetic field.

    • 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.