Multiple choice

The polar diagram of a conditionally stable system for open loop gain K = 1 is shown in figure. The open loop transfer function of the system is known to be stable. The closed loop system is stable for

  1. $k<5\ and \ \dfrac{1}{2} < k < \dfrac{1}{8}$
  2. $k<\dfrac{1}{8}\ and \ \dfrac{1}{2} < k < 5$
  3. $k<\dfrac{1}{8}\ and \ 5 < k$
  4. $k>\dfrac{1}{8}\ and \ k < 5$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

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