Question

Assertion (A): The phase angle plot in Bode diagram is not affected by the variation in the gain of the system.

Reason (R): The variation in the gain of the system has no effect on the phase margin of the system.

(a) Both A and R are true but R is correct explanation of A

(b) Both A and R are true but R is correct explanation of A

(c) A is true but R is false

(d) A is false but R is true

The question was asked in examination.

Enquiry is from Bode Plots topic in section Frequency Response Analysis of Control Systems

Answer 1

Right choice is (c) A is true but R is false

The explanation is: The variation in the gain of the system has effect on the phase margin but phase plot is not affected.