" A unity feedback system with open-loop transfer function G (s) = 4/[s(s+p)] is critically damped. The value of the parameter p is"

" A unity feedback system with open-loop transfer function G (s) = 4/[

1.	" A unity feedback system with open-loop transfer function G (s) = 4/[s(s+p)] is critically damped. The value of the parameter p is"
A.	" 4"
B.	" 3"
C.	" 2"
D.	" 1"
Answer» B. " 3"