logo

CuriousTab

CuriousTab

Discussion

Home ‣ Electronics ‣ Operational Amplifiers See What Others Are Saying!
  • Question

  • In a PLL, to obtain lock, the signal frequency must:


  • Options
  • A. come within the lock range
  • B. be less than the capture frequency
  • C. come within the capture range
  • D. be greater than the capture frequency

  • Correct Answer
  • come within the capture range 

    • More questions

    • 1. Reverse biasing a pn junction allows the flow of majority current.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. In a series RLC circuit the current can be found using:

    • Options
    • A.
    • B.
    • C. both of the above
    • D. none of the above
      • Discuss
    • 3. 

      The output voltage at the resonant frequency is _____ in the given circuit.


    • Options
    • A. 0 V
    • B. 557 mV
    • C. 6.08 V
    • D. 6.5 V
      • Discuss
    • 4. 

      If the voltage in the given circuit was cut in half, what would the current equal?


    • Options
    • A. 10 mA
    • B. 30 mA
    • C. 60 mA
    • D. 90 mA
      • Discuss
    • 5. A transformer is plugged into a 120 V rms source and has a primary current of 300 mA rms. The secondary is providing 18 V across a 10 Ω load. What is the efficiency of the transformer?

    • Options
    • A. 88%
    • B. 90%
    • C. 92%
    • D. 95%
      • Discuss
    • 6. If four 90 Ω resistors are connected in series across an 18 V source, the current equals ___.

    • Options
    • A. 50 mA
    • B. 0.2 A
    • C. 5 A
    • D. 20 A
      • Discuss
    • 7. Often a common-collector will be the last stage before the load; the main function of this stage is to

    • Options
    • A. provide voltage gain
    • B. buffer the voltage amplifiers from the low-resistance load
    • C. provide phase inversion
    • D. provide a high-frequency path to improve the frequency response
      • Discuss
    • 8. In practical applications, battery voltage:

    • Options
    • A. is restored as soon as disconnect occurs
    • B. is lowered as the load increases
    • C. may be stored indefinitely
    • D. will be reduced to zero as power is drawn
      • Discuss
    • 9. A good fuse will have:

    • Options
    • A. zero ohms resistance
    • B. a medium resistance
    • C. a high resistance
    • D. an infinite resistance
      • Discuss
    • 10. A(n) ________ converts an analog input to a digital output.

    • Options
    • A. flash converter
    • B. bipolar converter
    • C. ADC
    • D. DAC
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.