The OLTF of a unity feedback system is K(s+2)(s+4)/(s+5)(s+6) the angle of arrival of the root loci as s =-2, and s =-4 respectively are:
A. 0°,180°
B. 180°,0°
C. 90°,180°
D. 180°, 90°
Answer:B
The OLTF of a unity feedback system is K(s+2)(s+4)/(s+5)(s+6) the angle of arrival of the root loci as s =-2, and s =-4 respectively are:
A. 0°,180° B. 180°,0° C. 90°,180° D. 180°, 90°
Explanation: As it is type zero system therefore the angle of arrival can be either 180°, 0°.