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1
GATE ECE 2005
MCQ (Single Correct Answer)
+1
-0.3
Choose the function f (t );−$$\infty$$ < 1 < +$$\infty$$, for which a Fourier series cannot be defined.
A
3sin(25t)
B
4cos(20t+3)+2sin(10t)
C
exp (−|t|) sin(25t)
D
1
2
GATE ECE 2002
MCQ (Single Correct Answer)
+1
-0.3
Which of the following cannot be the Fourier series expansion of a periodic signal?
A
x(t) = 2cos t + 3 cos 3t
B
x(t) = 2cos $$\mathrm\pi$$t + 7 cos t
C
x(t) = cos t + 0.5
D
x(t) = 2cos 1.5$$\mathrm\pi$$t + sin 3.5 $$\mathrm\pi$$t
3
GATE ECE 1998
MCQ (Single Correct Answer)
+1
-0.3
The trigonometric Fourier series of a periodic time function can have only
A
cosine terms
B
sine terms
C
cosine and sine terms
D
d.c. and cosine terms
4
GATE ECE 1996
MCQ (Single Correct Answer)
+1
-0.3
The trigonometric Fourier series of an even function of time does not have the
A
dc term
B
cosine terms
C
sine terms
D
odd harmonic terms
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