Consider the feedback system in Figure 10.43, where
![](https://test.transtutors.com/qimg/32f1395b-aeff-496e-8889-9c5456405c78.png)
A phase lag compensator is designed for the system to give additional attenuation at higher frequencies. The compensator is
![](https://test.transtutors.com/qimg/7b342a57-6fd0-492c-a566-8ac4078f2ba0.png)
When compared with the uncompensated system (that is, Gc(s) = 1), the compensated system utilizing the lag compensator:
a. Increases the phase lag near the cross-over frequency.
b. Decreases the phase margin.
c. Provides additional attenuation at higher frequencies.
d. All of the above.
![](https://test.transtutors.com/qimg/bc3f0c75-55f5-4570-92d9-a2ba8d7da863.png)