1
GATE ECE 1999
MCQ (Single Correct Answer)
+1
-0.3
A signal x(t) has a Fourier transform X ($$\omega $$). If x(t) is a real and odd function of t, then X($$\omega $$) is
A
a real and even function of $$\omega $$
B
an imaginary and odd function of $$\omega $$
C
an imaginary and even function of $$\omega $$
D
a real and odd function of $$\omega $$
2
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
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
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
$${{X(f)} \over {jf}}$$
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Graduate Aptitude Test in Engineering
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