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Home ‣ Electronics and Communication Engineering ‣ Automatic Control Systems See What Others Are Saying!
  • Question

  • Assertion (A): Potentiometers can not be used as error detectors in position control systems.

    Reason (R): The resolution of a potentiometer places an upper limit on its accuracy


  • Options
  • A. Both A and R are correct and R is correct explanation of A
  • B. Both A and R are correct but R is not correct explanation of A
  • C. A is correct but R is wrong
  • D. R is correct but A is wrong

  • Correct Answer
  • R is correct but A is wrong 

    Explanation
    Potentiometers are used as error detectors.

    More questions

    • 1. Which of these has the highest dielectric strength?

    • Options
    • A. Mica
    • B. Air
    • C. Cotton
    • D. Rubber
      • Discuss
    • 2. Consider the probability density f(x) = ae-b|x| where x is a random variable whose allowable values range from x = - ? to x = + ?. P(1 ? x ? 2)

    • Options
    • A.
    • B.
    • C.
    • D. (e-b - e-2b)
      • Discuss
    • 3. Which of these devices is used in relaxation oscillator?

    • Options
    • A. UJT
    • B. SCR
    • C. DIAC
    • D. TRIAC
      • Discuss
    • 4. The number of turns in a coil is doubled. If initial time constant is T, the new time constant is

    • Options
    • A. T
    • B. 2T
    • C. 4T
    • D.
      • Discuss
    • 5. A PIN diode can be used

    • Options
    • A. as a shunt mounted switch
    • B. as a series mounted switch
    • C. both as series or shunt mounted switch
    • D. non of the above
      • Discuss
    • 6. Which converter is used in HVDC transmission?

    • Options
    • A. 3 pulse
    • B. 6 pulse
    • C. 12 pulse
    • D. 24 pulse
      • Discuss
    • 7. Two coaxial metallic cylinders have radii R1 and R2. The space between them is filled with a dielectric having dielectric constant ?r. The capacitance per metre length is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 8. In envelope detection of an AM waveform

    • Options
    • A. One side band and full-ampiitude carrier are needed
    • B. Both side bands and full-amplitude carrier are needed
    • C. Only two side bands are needed
    • D. Upper side band and part of carrier are needed
      • Discuss
    • 9. Which of the following statement regarding link loss for a satellite is wrong?

    • Options
    • A. For fixed antenna, it is inversely proportional to f2
    • B. For fixed frequency, it is inversely proportional to the product of the antenna aperture areas
    • C. For a given satellite operating at a given frequency, it is inversely proportional to
    • D. Loss in down-link is negligible as compared to that in uplink
      • Discuss
    • 10. Assertion (A): The steady state response, of a stable, linear, time invariant system, to sinusoidal input depends on initial conditions.

      Reason (R): Frequency response, in steady state, is obtained by replacing s in the transfer function by j?


    • Options
    • A. Both A and R are correct and R is correct explanation of A
    • B. Both A and R are correct but R is not correct explanation of A
    • C. A is correct but R is wrong
    • D. R is correct but A is wrong
      • Discuss

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