engineering recuitment NIELIT Scientific Assistant Mock Test 2025 Control Systems Frequency Response Analysis Nyquist Plot
A unity feedback system has the open loop transfer function \(G\left( s \right) = \frac{1}{{\left( {s - 1} \right)\left( {s + 2} \right)\left( {s + 3} \right)}}\). How many times the Nyquist plot of G(s) encircles the (-1, 0) point ?
1
Never
2
Twice
3
Thrice
4
Once