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  • Question

  • In Bode diagram (log magnitude plot) the factor In Bode diagram (log magnitude plot) the factor in the transfer function gives a line having slope - in the transfer function gives a line having slope


  • Options
  • A. -20 dB per octave
  • B. -10 dB per octave
  • C. -6 dB per octave
  • D. -2 dB per octave

  • Correct Answer
  • -6 dB per octave 

    Explanation
    For In Bode diagram (log magnitude plot) the factor in the transfer function gives a line having slope - term the slope is -20 dB/decade or -6 dB/octave because - 20 log 2 = -6 dB.

    Automatic Control Systems problems

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    • 1. If error voltage is e(t), integral square error =

    • Options
    • A. e2(t) dt
    • B.
    • C.
    • D. none of the above
      • Discuss
    • 2. In the given figure the input frequency is such that R << Xc, then

    • Options
    • A. v0 lags vi by 90°
    • B. v0 leads vi by 90°
    • C. v0 and vi are in phase
    • D. either (b) or (c)
      • Discuss
    • 3. In the given figure shows pole-zero plot. If steady state gain is 2 the transfer function G(s) is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 4. Bellows converts

    • Options
    • A. pressure difference into displacement
    • B. pressure difference into voltage
    • C. displacement into pressure difference
    • D. either (a) or (c)
      • Discuss
    • 5. For type 2 system, the magnitude and phase angle of the term (j?)2 in the denominator, at ? = 0, are respectively

    • Options
    • A. 0 and - 90°
    • B. 0 and + 90°
    • C. infinity and - 180°
    • D. infinity and + 180°
      • Discuss
    • 6. For the given figure,

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    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 7. For the given figure C(s)/R(s)

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 8. The given figure shows a pole zero diagram. The transfer function G(j1) is

    • Options
    • A. 0.5 ?0
    • B. 2.7 ?- 31°
    • C. 2 ?45°
    • D. 2 ?- 67.4°
      • Discuss
    • 9. In the given figure, of potentiometer V0 = Vi (R0/Ri) only when

    • Options
    • A. RL = 0
    • B. RL = ?
    • C. RL is neither low nor high
    • D. RL is low but not zero
      • Discuss
    • 10. Bode magnitude plot is drawn between

    • Options
    • A. magnitude of network function and ?
    • B. dB magnitude and log ?
    • C. dB magnitude and ?
    • D. loge (magnitude) and log ?
      • Discuss

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