Signals and Systems MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Signals and Systems, a fundamental topic in the field of Electronics and Communication Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Signals and Systems MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Signals and Systems mcq questions that explore various aspects of Signals and Systems problems. Each MCQ is crafted to challenge your understanding of Signals and Systems principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Electronics and Communication Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Signals and Systems MCQs are your pathway to success in mastering this essential Electronics and Communication Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Signals and Systems. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Signals and Systems knowledge to the test? Let's get started with our carefully curated MCQs!

Signals and Systems MCQs | Page 26 of 48

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Q251.
A 1 kHz sinusoidal signal is ideally sampled at 1500 samples/sec and the sampled signal is passed through an ideal low pass filter with cut off frequency 800 Hz. The output signal has the frequency.

a.

0 Hz

b.

0.75 kHz

c.

0.5 kHz

d.

0.25 kHz

Discuss
Answer: (c).0.5 kHz
Q252.
If autocorrelation sequence is Rc(n) = {1,2,3,4,6,8} then what will be energy of sequence?

a.

2

b.

24

c.

3

d.

288

Discuss
Answer: (c).3
Q253.
The function ฮด(t - b) is

a.

an impulse function

b.

a step function originating at t = b

c.

an impulse function originating at t = b

d.

none of the above

Discuss
Answer: (c).an impulse function originating at t = b
Q254.
An ac network has a power factor of 0.8 lagging for fundamental frequency. If the applied voltage contains thrid and fifth harmonics, the overall power factor will be

a.

more than 0.8 lagging

b.

0.8 lagging

c.

less than 0.8 lagging

d.

0.8 lagging or less

Discuss
Answer: (c).less than 0.8 lagging
Q255.
what will be sampling rate to aviod aliasing for the signal m(t) = 10 cos 100 ฯ€t?

a.

โ‰ค 100 n2

b.

โ‰ฅ 100 n2

c.

โ‰ฅ1/25 sec

d.

โ‰ค1/25 sec

Discuss
Answer: (d).โ‰ค1/25 sec
Q256.
Choose the function f(t), - โˆž < t < + โˆž, for which a Fourier series cannot be defined

a.

3 sin (25t)

b.

4 cos (20t + 3) + 2 sin (10t)

c.

exp - | t | sin 25 t

d.

1

Discuss
Answer: (c).exp - | t | sin 25 t
Q257.
A pulse function having magnitude E and duration from t = 0 to t = a can be represented as

a.

sum of two pulse functions

b.

difference of two pulse functions

c.

difference of two step functions each of magnitude E and one originating at t = 0 and the other at t = a

d.

none of the above

Discuss
Answer: (c).difference of two step functions each of magnitude E and one originating at t = 0 and the other at t = a
Q258.
If I(s) = 5(s+250) / s(s+100) , initial value of i(t) is

a.

0

b.

5 A

c.

10 A

d.

- 5A

Discuss
Answer: (b).5 A
Q259.
The DTFT of x(n) = ฮด(n) will be

a.

1

b.

0

c.

โˆž

d.

not defined

Discuss
Answer: (a).1
Q260.
Principle of superposition is applicable to

a.

linear systems only

b.

nonlinear systems only

c.

both linear and non linear system

d.

linear systems and some nonlinear systems

Discuss
Answer: (a).linear systems only
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