# Electronics and Communication Engineering - Automatic Control Systems

Exercise : Automatic Control Systems - Section 4
11.
A lead compensator is basically a
high pass filter
low pass filter
band stop filter
none of the above
Explanation:

See transfer function in the equation .

12.
In Bode diagram (log magnitude plot) of the factor 1/(1 + jωT) in the transfer function the log magnitude for ω << 1/T can be approximated by
0 dB
20 log ωT dB
-20 log ωT dB
none of the above
Explanation:
No answer description is available. Let's discuss.

13.

Assertion (A): The part of root locus on the real axis is not dependent on the poles and zeros which are not on the real axis.

Reason (R): Poles and zeros which are not on the real axis occur in conjugate pairs

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is correct but R is wrong
R is correct but A is wrong
Explanation:
No answer description is available. Let's discuss.

14.
The phase angle of is constant and equal to - 90° for all values of ω
True
False