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 30 of 48

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Q291.
For an ac sinusoidal wave, the rms value is 10 A. For the same wave delayed by 60° in each half cycle, the rms value is likely to be

a.

10 A

b.

7.07 A

c.

6.35 A

d.

3.5 A

Discuss
Answer: (a).10 A
Q292.
It f(t) is an odd function, the coefficients Fn in the exponential form of Fourier series

a.

are real

b.

are imaginary

c.

are complex

d.

may be real or imaginary

Discuss
Answer: (b).are imaginary
Q293.
If the system transfer function of a discrete time system H(z) = z/(z-1), then system is

a.

stable

b.

unstable

c.

stable at z = 1

d.

unstable at z = 1

Discuss
Answer: (a).stable
Q294.
Two rectangular waveforms of duration t1 and t2 seconds are convolved. What is the shape of the resulting waveform?

a.

Triangular

b.

Rectangular

c.

Trapezoidal

d.

Semi-circular

Discuss
Answer: (c).Trapezoidal
Q295.
The function Ae^[(s + jฯ‰)t] represens a rotating phasor having a magnitude increasing with time.

a.

True

b.

False

c.

May be True or False

d.

can't say

Discuss
Answer: (a).True
Q296.
If ฮด(t) denotes a unit impulse, Laplace transform of d²/dt²[ฮด(t)] is

a.

1

b.

s²

c.

s

d.

s¯²

Discuss
Answer: (b).s²
Q297.
The function (sin x)/x

a.

has a period 2ฯ€, decays with increasing x and has zeros at nฯ€, n = ± 1, ± 2

b.

has a period ฯ€

c.

has a period ฯ€/2

d.

has a period 2ฯ€, decays with increasing x, is an even function and has zeros at nฯ€, n = ± 1, ± 2

Discuss
Answer: (d).has a period 2ฯ€, decays with increasing x, is an even function and has zeros at nฯ€, n = ± 1, ± 2
Q298.
Which of the following represents a stable system?

1. Impulse response decreases exponentially.
2. Area within the impulse response in finite.
3. Eigen values of the system are positive and real.
4. Roots of the characteristic equation of the system are real and positive.

Select the answer using the following codes:

a.

1 and 4

b.

1 and 3

c.

2, 3 and 4

d.

1, 2

Discuss
Answer: (d).1, 2
Q299.
Auto correlation for ฯ„ = 0 is equal to

a.

average power S of waveform

b.

square of average power S of waveform

c.

half of average power S of waveform

d.

square root of average power S of waveform

Discuss
Answer: (a).average power S of waveform
Q300.
X and Y are two random variable and Z = X + Y. Let ฯƒ²x, ฯƒ²y and ฯƒ²z be variance of X, Y and Z. Then

a.

ฯƒ²z = ฯƒ²x + ฯƒ²y

b.

ฯƒ²z โ‰ค ฯƒ²x + ฯƒ²y

c.

ฯƒ²z < ฯƒ²x + ฯƒ²y

d.

ฯƒ²z > ฯƒ²x + ฯƒ²y

Discuss
Answer: (a).ฯƒ²z = ฯƒ²x + ฯƒ²y
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