logo

CuriousTab

CuriousTab

Discussion

Home ‣ Electronics and Communication Engineering ‣ Radio Receivers See What Others Are Saying!
  • Question

  • The noise produced by a resistor is proportional to


  • Options
  • A. absolute temperature
  • B. (absolute temperature)2
  • C. The noise produced by a resistor is proportional to absolute temperature (absolute temperature)2
  • D. The noise produced by a resistor is proportional to absolute temperature (absolute temperature)2

  • Correct Answer
  • absolute temperature 

    • More questions

    • 1. A 75 ohm line is first short terminated and minima locations are noted. Then the short is replaced by resistive load and minima location are again noted. If minima location are not altered and VSWR is 3, the value of resistive load is

    • Options
    • A. 25 ?
    • B. 50 ?
    • C. 225 ?
    • D. 250 ?
      • Discuss
    • 2. Frequency shift keying is used mostly in

    • Options
    • A. telegraphy
    • B. telephony
    • C. satellite communication
    • D. radio transmission
      • Discuss
    • 3. If ?r = ?r' - j?r" tan ? = .

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. Which of the following has the highest input impedance?

    • Options
    • A. CE
    • B. CB
    • C. CC
    • D. Push pull
      • Discuss
    • 5. Degaussing in a picture tube means

    • Options
    • A. Adding magnetism in mask and mounting frame
    • B. Removing residual magnetism in mask, shield etc...
    • C. Increasing resistance of coils to decrease time constant
    • D. Decreasing resistance of coils to increase time constant.
      • Discuss
    • 6. In a parallel resonant circuit, the circuit current at resonance is maximum.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. Both OR and AND gates can have only two inputs.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. Klystron amplifier is not used to amplifier very weak microwave signals due to

    • Options
    • A. low gain for weak signals
    • B. low noise for weak signals
    • C. high noise
    • D. both (a) and (b)
      • Discuss
    • 9. Which of the following is used in integrated circuits?

    • Options
    • A. Microstrip line
    • B. Coaxial line
    • C. Twin wire line
    • D. Shield cable
      • Discuss
    • 10. The directive gain of a transmitting antenna is

    • Options
    • A. proportional to wavelength
    • B. inversely proportional to wavelength
    • C. proportional to square of wavelength
    • D. inversely proportional to square of wavelength
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.