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Home Electronics and Communication Engineering Automatic Control Systems See What Others Are Saying!
  • Question
  • From the noise point of view, bandwidth should


  • Options
  • A. be large
  • B. not be too large
  • C. should be as large as possible
  • D. should be infinite

  • Correct Answer
  • not be too large 

    Explanation
    If noise is to be eliminated, bandwidth cannot be large.

    More questions

    • 1. Radar reciever has high sensitivity and low noise figure

    • Options
    • A. True
    • B. False
    • Discuss
    • 2. A single phase electric heater uses phase controlled thyristors. The firing angle is 90°. The degree of heating is

    • Options
    • A. 25% of maximum
    • B. 50% of maximum
    • C. 75% of maximum
    • D. none of the above
    • Discuss
    • 3. A characteristic property of crystal is its periodicity of structure.

    • Options
    • A. True
    • B. False
    • Discuss
    • 4. The number of distinct Boolean expression of 4 variables is

    • Options
    • A. 16
    • B. 256
    • C. 1024
    • D. 65536
    • Discuss
    • 5. Assertion (A): A class C chopper can operate in first and second quadrants

      Reason (R): A class B chopper operates only in second quadrant.


    • Options
    • A. Both A and R are correct and R is correct explanation of A
    • B. Both A and R correct but R is not correct explanation of A
    • C. A is correct but R is wrong
    • D. A is wrong but R is correct
    • Discuss
    • 6. In a conductor the current flow is due to

    • Options
    • A. holes
    • B. electrons
    • C. ions
    • D. electrons and ions
    • Discuss
    • 7. Which of these commutation methods uses two leads?

    • Options
    • A. Class A
    • B. Class B
    • C. Class C
    • D. Class D
    • Discuss
    • 8. The ROC of sequence in the Z.T. of sequence x[n] = an ? [n] is

    • Options
    • A. z > a
    • B. z < a
    • C. |z| > a
    • D. |z| < a
    • Discuss
    • 9. By inserting a plate of dielectric between the plates of a parallel plate capacitor, the energy stored in the capacitor is increased five times. The dielectric constant of material is

    • Options
    • A.
    • B.
    • C. 5
    • D. 25
    • Discuss
    • 10. An RLC series circuit is underdamped. To make it overdamped, the value of R

    • Options
    • A. has to be increased
    • B. has to be decreased
    • C. has to be increased to infinity
    • D. has to be reduced to zero
    • Discuss


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