GATE Electrical 2014 Set 1 | Question: 18

Question

The root locus of a unity feedback system is shown in the figure

The closed loop transfer function of the system is

• A. $\dfrac{C(s)}{R(s)}=\dfrac{K}{(s+1)(s+2)} \\$
• B. $\dfrac{C(s)}{R(s)}=\dfrac{-K}{(s+1)(s+2)+K} \\$
• C. $\dfrac{C(s)}{R(s)}=\dfrac{K}{(s+1)(s+2)-K} \\$
• D. $\dfrac{C(s)}{R(s)}=\dfrac{K}{(s+1)(s+2)+K}$