engineering recuitment BEL Probationary Engineers Mock Test 2025 Control Systems Frequency Response Analysis Nyquist Plot
If a Nyquist plot encircles the point (-1, 0) N times in the anticlockwise direction and has Z zeros of the open-loop system in the right-half plane, the number of poles (P) of the closed-loop system in the right-half plane will be:
1
P = N - Z
2
P = Z - N
3
P = (N + Z)/2
4
P = Z + N