Trishna - The Technical Quiz

20 Questions

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Technical Quizzes & Trivia

 


Questions and Answers
  • 1. 
    Which mode of operation is preferred to work BJT as an attenuator ?
    • A. 

      Saturation

    • B. 

      Reverse active

    • C. 

      Cut off

    • D. 

      Active

  • 2. 
    What is the r.m.s. value of output voltage for an half wave rectifier ,if input V(max)=2 volts ? 
    • A. 

      1.414

    • B. 

      1

    • C. 

      2

    • D. 

      2.828

  • 3. 
    What is the effect of negative feedback  ?
    • A. 

      Increase in noice

    • B. 

      Decrease in bandwidth

    • C. 

      Decrease in gain

    • D. 

      Both b & c

  • 4. 
    Bandwidth of DSB-SC signal if maximum frequency component of input message signal 4KHz?
    • A. 

      4KHz

    • B. 

      8KHz

    • C. 

      6KHz

    • D. 

      2KHz

  • 5. 
    𝛿(-2t)=
    • A. 

      -𝛿(t)/2

    • B. 

      -2𝛿(t)

    • C. 

      𝛿(t)/2

    • D. 

      2𝛿(t)

  • 6. 
    What is the value of Rfor which maximum power is transferred to RL?
    • A. 

      5 Ω

    • B. 

      10 Ω

    • C. 

      0 Ω

    • D. 

      ∞ Ω

  • 7. 
    Condition for symmetic network ?
    • A. 

      Y12 = - Y21

    • B. 

      AD - BC = 1

    • C. 

      Z11 = Z22

    • D. 

      H12 = - h21

  • 8. 
    Any series RLC network represents__________?
    • A. 

      High pass filter

    • B. 

      Low pass filter

    • C. 

      Band pass filter

    • D. 

      Band reject filter

  • 9. 
    The value of frequency at which maximum current flows in the circuit is______
    • A. 

      1

    • B. 

      1/2

    • C. 

      1/4π

    • D. 

      1/2π

  • 10. 
    Transfer function of a system is 
    • A. 

      L.T of impulse response

    • B. 

      L.T of unit step response

    • C. 

      Ratio of L.T of output and L.T of input

    • D. 

      Both '1' and '3'

  • 11. 
    Curl of vector is always
    • A. 

      Irrotational

    • B. 

      Solenoidal

    • C. 

      Both

    • D. 

      None

  • 12. 
    Convert Binary code (1011)2 to Grey code ?
    • A. 

      1111

    • B. 

      0101

    • C. 

      1110

    • D. 

      1101

  • 13. 
    Bandwidth of a given circuit is
    • A. 

      4 Hz

    • B. 

      2 Hz

    • C. 

      6 Hz

    • D. 

      8 Hz

  • 14. 
    Given figure  is equivalent to ?
    • A. 

      NAND

    • B. 

      OR

    • C. 

      NOR

    • D. 

      AND

  • 15. 
    The output expression 'f' is
    • A. 

      AB

    • B. 

      A'+B

    • C. 

      A+B

    • D. 

      A+B'

  • 16. 
    Number of NAND gates required  for expression  A'B+AB' ?
    • A. 

      5

    • B. 

      3

    • C. 

      4

    • D. 

      6

  • 17. 
    The frequency of output waveform if propagation delay of each gate is 1/6 ns
    • A. 

      1MHz

    • B. 

      10GHz

    • C. 

      1GHz

    • D. 

      100MHz

  • 18. 
    RMS value of  ( 5 + 2cos2t + 3sin2t )  =
  • 19. 
    Internal resistance of Ideal voltage source is
  • 20. 
    Conductivity of pure seiconductor at '0'K is