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 14 of 48

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Q131.
If x1(t) = 2 sin Ο€t + cos 4 Ο€t and x2(t) = sin 5 Ο€t + 3 sin 13 Ο€t , then

a.

x1, x2 both periodic

b.

x1 x2 both not periodic

c.

x1 periodic, x2 not periodic

d.

x1 is not periodic ; but x2 is periodic

Discuss
Answer: (a).x1, x2 both periodic
Q132.
An ac network has a power factor of 0.8 leading if the applied wave is of fundamental frequency. If the applied wave contains third and fifth harmonics, the overall power factor will be

a.

0.8 leading

b.

less than 0.8 leading

c.

more than 0.8 leading

d.

0.8 leading or more

Discuss
Answer: (c).more than 0.8 leading
Q133.
Assertion (A): A sweep circuit operates by virtue of recurring transient phenomenon.

Reason (R): Transients are always undesirable.

a.

Both A and R are correct and R is correct explanation of A

b.

Both A and R are correct but R is not correct explanation of A

c.

A is true, R is false

d.

A is false, R is true

Discuss
Answer: (c).A is true, R is false
Q134.
Which one is a non-causal system?

a.

y(n) = x(2n)

b.

y(n) = x(n/2)

c.

y(n) = x(n/2) + x(n)

d.

all

Discuss
Answer: (a).y(n) = x(2n)
Q135.
A linear system is characterized by H(Ο‰) = Be^(-2Ο‰²) the system is physically

a.

unrealizable

b.

realizable

c.

depends upon B

d.

depends upon constant 2

Discuss
Answer: (a).unrealizable
Q136.
The current in a circuit with 10 Ξ© resistance is i = 3 + 4 sin (100 t + 45°) + 4 sin (300 t + 60°) A. The rms current and power dissipated are

a.

√41 A and 410 W

b.

√35 A and 350 W

c.

5 A and 250 W

d.

11 A and 1210 W

Discuss
Answer: (c).5 A and 250 W
Q137.
Fourier transform pair are

a.

autocorrelation and power spectral density

b.

autocorrelation and convoloution

c.

convolution and power spectral density

d.

autocorrelation and energy

Discuss
Answer: (a).autocorrelation and power spectral density
Q138.
A voltage wave is i = 100 sin (Ο‰t). Its average value calculated over one half cycle is

a.

zero

b.

70.72 V

c.

63.70 V

d.

none of the above

Discuss
Answer: (c).63.70 V
Q139.
An RLC series circuit has a variable inductance. The value of L for resonance conditions at fundamental frequency is 0.18 H. For resonance conditions at third harmonic frequency the value of inductance is

a.

0.54 H

b.

0.06 H

c.

0.02 H

d.

1.62 H

Discuss
Answer: (c).0.02 H
Q140.
which of the following is not correct?

a.

P(αΎΉ) = P(A) - 1

b.

0 ≀ P ≀ 1

c.

If A and B are mitual exclusive then P(A + B) = P(A) + P(B)

d.

P(αΎΉ) = 1 - P(A)

Discuss
Answer: (a).P(αΎΉ) = P(A) - 1
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