1
GATE ECE 1998
MCQ (Single Correct Answer)
+1
-0.3
The amplitude spectrum of a Gaussian pulse is
A
uniform
B
a sine function
C
Gaussian
D
an impulse function
2
GATE ECE 1998
MCQ (Single Correct Answer)
+1
-0.3
The Fourier transform of a function x(t) is X(f). The Fourier transform of $${{dx(t)} \over {dt}}$$ will be
A
$${{dX(f)} \over {dt}}$$
B
$$j2\pi fX(f)$$
C
$$jfX(f)$$
D
$${{X(f)} \over {jf}}$$
3
GATE ECE 1998
MCQ (Single Correct Answer)
+1
-0.3
The Fourier transform of a voltage of a voltage signal x(t) is X(f). The unit of |X(f)| is
A
Volt
B
Volt - sec
C
Volt/sec
D
$$Vol{t^2}$$
4
GATE ECE 1998
MCQ (Single Correct Answer)
+1
-0.3
If L$$\left[ {f\left( t \right)} \right]$$ = $$\omega /\left( {{s^2} + {\omega ^2}} \right),$$ then the value of $$\matrix{ {Lim\,f\,\left( t \right)} \cr {t \to \infty } \cr } $$
A
cannot be determined
B
is zero
C
is unity
D
is infinite
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