engineering recuitment BHEL Engineer Trainee Mock Test 2025 Signals and Systems Z Transform Region of Convergence of a Causal System
The pole-zero pattern of the z-transform X(z) for a system is as shown:
The ROC of the system for which the Fourier transform exists, and the ROC for which the system is causal are respectively:
1
1/2 < |z| < 2, |z|> 5
2
|z|< ½, |z| > 5
3
|z|< ½, |z|< 5
4
None of these