Explore topic-wise MCQs in Signals & Systems Questions and Answers.

This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Signals & Systems Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.

1.

A signal is an energy signal if the signal has average energy equal to __________

A. Infinite
B. Finite
C. Zero
D. Does not depend on the average energy value
Answer» C. Zero
Discussion
2.

A system has a block G1(s) which has input x (s) and output y1(s). This output is fed as input to a second block G2(s) which has output y2(s). For this system, G1(s) = \(\frac{s^{-1}}{1 + 2s^{-1} + s^{-2}}\).

A. G2(s) for the given system to be invertible is given by _______________
B. \(\frac{s}{1+2s+s^2}\)
C. \(\frac{1+2s+s^2}{s}\)
D. \(\frac{1}{1+2s+s^2}\)
E. 1+2s+s2
Answer» C. \(\frac{1+2s+s^2}{s}\)
Discussion
3.

A periodic signal has power \(\frac{P}{4}\) equal to average energy per period then rms value of signal is given by ________________

A. \(\frac{\sqrt{P}}{4}\)
B. \(\frac{P}{4}\)
C. \(\frac{P}{2}\)
D. \(\frac{\sqrt{P}}{2}\)
Answer» E.
Discussion
4.

Power spectral density of the signal given below is _______________

A. 0
B. 6
C. ∞
D. -6
Answer» C. ∞
Discussion
5.

Given signal given, \( y (t) = 2sin (\frac{2}{3} t) + 4sin (\frac{1}{4} t – \frac{π}{4}) + 6sin⁡ (\frac{1}{3} t – \frac{π}{5}) + 8sin⁡ (\frac{1}{2} t – \frac{π}{7}\)). The period of y(t) is ________________

A. 12 π
B. 24 π
C. 8 π
D. 16 π
Answer» C. 8 π
Discussion
6.

The resultant signal obtained after frequency convolution along with constant multiplier \(\frac{1}{2πj}\) of the signals whose Laplace transforms are given by, \(\frac{1}{s+2}\) and \(\frac{1}{s+1}\).

A. e-2t + e-t
B. e-2t
C. e-3t
D. e-t
Answer» D. e-t
Discussion
7.

For the signal \(x (t) = δ(t) – \frac{4}{3} e^{-t} \,u(t) + \frac{1}{3} e^{2t} \,u(t)\). It has how many poles and zeroes at infinity?

A. 1, 0
B. 2, 2
C. 2, 0
D. 0, 0
Answer» E.
Discussion