The phase margin (in degrees) of a system having the loop transfer function G(s) H(s)=2√3/s(s+1) is:
A. 45°
B. -30°
C. 60°
D. 30°
Answer:D
The phase margin (in degrees) of a system having the loop transfer function G(s) H(s)=2√3/s(s+1) is:
A. 45° B. -30° C. 60° D. 30°
Explanation: Phase margin is calculated at gain cross over frequency where magnitude of the transfer function is 1.