A plant controlled by a proportional controller. If a time delay element is introduced in the loop its :
A.	Phase margin remains the same
B.	Phase margin increases
C.	Phase margin decreases
D.	Gain margin increases
Answer:C
A plant controlled by a proportional controller. If a time delay element is introduced in the loop its :
A.	Phase margin remains the same B.	Phase margin increases C.	Phase margin decreases D.	Gain margin increases