The open loop dc gain of the unity negative feedback system with closed-loop transfer function $$\frac{{s + 4}}{{{s^2} + 7s + 13}}$$ is
A. $$\frac{4}{{13}}$$
B. $$\frac{4}{9}$$
C. 4
D. 13
Answer: Option B
This Question Belongs to Electronics And Communications Engineering >> Control Systems
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