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Consider the following statements regarding control systems:
  1. In open loop control system, the control action depends upon the desired output.
  2. All control systems operated by present timing mechanism are open loop.
  3. In a closed loop control system feedback signal is usually negative.
  4. In open-loop control system stability cannot be ensured.
Which of the above statements are correct?
  • a)
    1, 2, 3 and 4
  • b)
    1 and 4 only
  • c)
    1,2 and 3 only
  • d)
    2 and 3 only
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Consider the following statements regarding control systems: In open l...
  • There is no-control action in open loop systems. Hence, statement 1 is false.
  • Generally, all control systems operated by present timing mechanism are open loop because they are more stable than closed loop control system. Hence, statement-2 is true.
  • Due to various advantages of negative feedback systems (except reduction in gain), feedback signal is usually negative in a closed loop control system. Hence, statement-3 is true.
  • In open-loop control systems stability can be ensured because they are more stable than closed-loop control system.
  • Thus, only statements 2 and 3 are true.
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Consider the following statements regarding control systems: In open loop control system, the control action depends upon the desired output. All control systems operated by present timing mechanism are open loop. In a closed loop control system feedback signal is usually negative. In open-loop control system stability cannot be ensured.Which of the above statements are correct?a)1, 2, 3 and 4b)1 and 4 onlyc)1,2 and 3 onlyd)2 and 3 onlyCorrect answer is option 'D'. Can you explain this answer?
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