1
GATE ECE 1998
+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
2
GATE ECE 1995
+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.
3
GATE ECE 1994
+1
-0.3
The 3-dB bandwidth of a typical second- order system with the transfer function $${{C\left( s \right)} \over {R(s)}} = {{\omega _n^2} \over {{s^2} + 2\xi {\omega _n}s + \omega _n^2}}$$, is given by
A
$${\omega _n}\sqrt {1 - 2{\xi ^2}}$$
B
$${\omega _n}\sqrt {(1 - {\xi ^2}) + \sqrt {{\xi ^4} - {\xi ^2} + 1} }$$
C
$${\omega _n}\sqrt {(1 - 2{\xi ^2}) + \sqrt {4{\xi ^4} - 4{\xi ^2} + 2} }$$
D
$${\omega _n}\sqrt {(1 - 2{\xi ^2}) - \sqrt {4{\xi ^4} - 4{\xi ^2} + 2} }$$
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
EXAM MAP
Medical
NEET