Control of the Effects of Disturbance Signals by Use of Feedback MCQ

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• The second derivative input signals modify which of the following?
  ক

  The time constant of the system

  খ

  Damping of the system

  গ

  The gain of the system

  ঘ

  The time constant and suppress the oscillations
• The transient response, with feedback system,
  ক

  Rises slowly

  খ

  Rises quickly

  গ

  Decays slowly

  ঘ

  Decays quickly
• On which of the following factors does the sensitivity of a closed loop system to gain changes and load disturbances depend?
  ক

  Frequency

  খ

  Loop gain

  গ

  Forward gain

  ঘ

  All of the mentioned
• The band width, in a feedback amplifier.
  ক

  Remains unaffected

  খ

  Decreases by the same amount as the gain increase

  গ

  Increases by the same amount as the gain decrease

  ঘ

  Decreases by the same amount as the gain decrease
• Transfer function of a system is used to calculate which of the following?
  ক

  The order of the system

  খ

  The time constant

  গ

  The output for any given input

  ঘ

  The steady state gain
• Zero initial condition for a system means
  ক

  Input reference signal is zero

  খ

  Zero stored energy

  গ

  Initial movement of moving parts

  ঘ

  System is at rest and no energy is stored in any of its components
• A control system with excessive noise, is likely to suffer from
  ক

  Saturation in amplifying stages

  খ

  Loss of gain

  গ

  Vibrations

  ঘ

  Oscillations
• The output of a feedback control system must be a function of
  ক

  Reference and output

  খ

  Reference and input

  গ

  Input and feedback signal

  ঘ

  Output and feedback signal
• Regenerative feedback implies feedback with
  ক

  Oscillations

  খ

  Step input

  গ

  Negative sign

  ঘ

  Positive sign