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 13 of 48

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Q121.
The signal define by the equations u(t - a) = 0 for t < a and u(t - a) = 1 for t โ‰ฅ a is

a.

a unit step function

b.

a shifted unit step function orginating at t = a

c.

a pulse function

d.

none of the above

Discuss
Answer: (b).a shifted unit step function orginating at t = a
Q122.
A voltage wave v = 10 + 20 sin ฯ‰t + 7.5 sin 3 ฯ‰(t) is applied to a series combination of two elements. The current is i = 5 sin (ฯ‰t + 20°) + 1.5 sin (3ฯ‰t + 10°). The elements are

a.

R and C

b.

R and L

c.

L and C

d.

both inductances

Discuss
Answer: (a).R and C
Q123.
If F(t) = ฮด(t - a), F(s)=

a.

0

b.

1

c.

e^(-as)

d.

e^(as)

Discuss
Answer: (c).e^(-as)
Q124.
The property is not valid for basic singularity function is

a.

it is even signal

b.

convolution of any arbitary function x(t) and an impulse is the original function itself

c.

the sum of two impulses at same location is the impulse with the strength equal to the summation of individual strengths.

d.

none of these.

Discuss
Answer: (d).none of these.
Q125.
Magnitude Plot of a Composite signal x(t) = e^(2jt) + e^(3jt) is

a.

half wave rectified sinusoidal

b.

full wave rectified sinusoidal

c.

exponentially increasing sinusoidal

d.

exponentially decreasing sinusoidal

Discuss
Answer: (b).full wave rectified sinusoidal
Q126.
The trignometric Fourier series of an even function of time does not have

a.

dc term

b.

cosine term

c.

sine term

d.

odd harmonic terms

Discuss
Answer: (c).sine term
Q127.
An ac wave with superimposed dc is symmetrical about x - axis.

a.

True

b.

False

c.

May be True or False

d.

can't say

Discuss
Answer: (b).False
Q128.
Assertion (A): If a wave v = A1 + A2 sin ฯ‰t is applied to a pure capacitor the current wave is:
i = A3 sin(ฯ‰t + 90°)

Reason (R): A capacitor presents infinite impedance to dc.

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: (a).Both A and R are correct and R is correct explanation of A
Q129.
State variables which describe a system are a unique set.

a.

True

b.

False

c.

May be True or False

d.

can't say

Discuss
Answer: (b).False
Q130.
The z- transform of a systerm is H(z) = z/(z-0.2). If the ROC is |z| < 0.2, then the impluse response of the system is

a.

(0.2)โฟ โˆช[n]

b.

(0.2)โฟ โˆช[- n - 1]

c.

-(0.2)โฟ โˆช[n]

d.

-(0.2)โฟ โˆช[- n - 1]

Discuss
Answer: (d).-(0.2)โฟ โˆช[- n - 1]
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