1
GATE ECE 1998
MCQ (Single Correct Answer)
+1
-0.3
In the Bode-plot of a unity feedback control system, the value of phase of G($$j\omega $$) at the gain cross over frequency is $$ - 125^\circ $$. The phase margin of the system is
A
$$ - 125^\circ $$
B
$$ - 55^\circ $$
C
$$ 55^\circ $$
D
$$ 125^\circ $$
2
GATE ECE 1998
MCQ (Single Correct Answer)
+1
-0.3
The Nyquist plot of a loop transfer function G$$(j\omega )$$ H$$(j\omega )$$, of a system encloses the (-1, j0) point. The gain margin of the system is
A
less than zero
B
zero
C
greater than zero
D
infinity
3
GATE ECE 1995
MCQ (Single Correct Answer)
+1
-0.3
Non - minimum phase transfer function is defined as the transfer function
A
which has zeroes in the right - half of S-plane.
B
which has zeroes only in the left - half of S-plane.
C
which has poles in the right - half of S-plane.
D
which has poles in the left - half of S-plane.
4
GATE ECE 1994
Fill in the Blanks
+1
-0
The open loop frequency response of a system at two particular frequencies are given by: 1.2 $$\angle - 180^\circ $$ and 1.0 $$\angle - 190^\circ $$. The closed loop unity feedback control system is then
GATE ECE Subjects
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