For the given system, it is desired that the system be stable. The minimum value of $$\alpha $$ for this condition is _________

The feedback system shown below oscillates at $$2$$ rad/s when

Figure shows a feedback system where $$K>0$$

The range of $$k$$ for which system is stable will by given by

If the loop gain $$K$$ of a negative feedback system having a loop transfer function $$K\left( {s + 3} \right)/{\left( {s + 8} \right)^2}$$ is to be adjusted to induce a sustained oscillation then