logo

CuriousTab

CuriousTab

Discussion

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

  • Decreasing the gain in the given circuit could be achieved by reducing the amplitude of the input vo

    Decreasing the gain in the given circuit could be achieved by


  • Options
  • A. reducing the amplitude of the input voltage
  • B. increasing the value of the feedback resistor
  • C. increasing the value of the input resistor
  • D. removing the feedback resistor

  • Correct Answer
  • increasing the value of the input resistor 

    • More questions

    • 1. The voltage across R1 is 10 volts.


    • Options
    • A. True
    • B. False
      • Discuss
    • 2. By increasing the resistance of a coil you can increase the Q of the coil at resonance.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. Changing ________ can control the voltage gain of a common-source amplifier.

    • Options
    • A. the input voltage
    • B. gm
    • C. VDD
    • D. RS
      • Discuss
    • 4. 

      What is the power dissipated in the primary of the transformer in the given circuit?


    • Options
    • A. 25 mW
    • B. 500 mW
    • C. 12.5 W
    • D. 62.5 W
      • Discuss
    • 5. In a binary-weighted digital-to-analog converter (DAC), the values of the input resistors are chosen to be proportional to the binary weights of the corresponding input bits.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. 

      In the given circuit, if Rf is reduced to 8 kΩ, the circuit becomes the ______.


    • Options
    • A. digital-to-analog converter
    • B. averaging amplifier
    • C. scaling adder
    • D. summing amplifier with gain greater than unity
      • Discuss
    • 7. Initially, the closed-loop gain (Acl) of a Wien-bridge oscillator should be

    • Options
    • A. Acl < 3
    • B. Acl > 3
    • C. 0
    • D. Acl ≅ 1
      • Discuss
    • 8. The center frequency of a band-pass filter is always equal to the

    • Options
    • A. bandwidth
    • B. ?3 dB frequency
    • C. bandwidth divided by Q
    • D. geometric average of the critical frequencies
      • Discuss
    • 9. If a calculator display was "0.00263," what would this answer be in percent?

    • Options
    • A. 0.026%
    • B. 0.26%
    • C. 2.63%
    • D. 26.3%
      • Discuss
    • 10. A practical CE amplifier has the input on the base and the output taken off the emitter.

    • 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.