1
GATE ECE 2009
MCQ (Single Correct Answer)
+2
-0.6
An LTI system having transfer function $${{{s^2} + 1} \over {{s^2} + 2s + 1}}$$ and input x(t) = sin (t + 1) is in steady state. The output is sampled at a rate $${\omega _s}\,\,rad/s$$ to obtain the final output {y(k)}. Which of the following is true?
A
y(.) is zero for all sampling frequencies $${\omega _s}$$
B
y(.) is nonzero for all sampling frequencies $${\omega _s}$$
C
y(.) is nonzero for $${\omega _s}$$ > 2, but zero for $${\omega _s}$$ < 2
D
y(.) is zero for $${\omega _s}$$ > 2, but nonzero for $${\omega _s}$$ < 2
2
GATE ECE 2007
MCQ (Single Correct Answer)
+2
-0.6
A Hilbert transformer is a
A
non-linear system
B
non-causal system
C
time-varying system
D
low-pass system
3
GATE ECE 2007
MCQ (Single Correct Answer)
+2
-0.6
In the following scheme, if the spectrum M(f) of m(t) is as shown, then the spectrum Y(f) of y(t) will be: GATE ECE 2007 Signals and Systems - Miscellaneous Question 4 English 1 GATE ECE 2007 Signals and Systems - Miscellaneous Question 4 English 2
A
GATE ECE 2007 Signals and Systems - Miscellaneous Question 4 English Option 1
B
GATE ECE 2007 Signals and Systems - Miscellaneous Question 4 English Option 2
C
GATE ECE 2007 Signals and Systems - Miscellaneous Question 4 English Option 3
D
GATE ECE 2007 Signals and Systems - Miscellaneous Question 4 English Option 4
4
GATE ECE 2006
MCQ (Single Correct Answer)
+2
-0.6
As x is increased from $$ - \infty \,\,to\,\infty $$, the function $$f(x) = {{{e^x}} \over {1 + {e^x}}}$$
A
monotonically increases
B
monotonically decreases
C
increases to a maximum value and then decreases
D
decreases to a minimum value and then increases
GATE ECE Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
CBSE
Class 12