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 28 of 48

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Q271.
If f(t) is in volts, then F(jฯ‰) is in

a.

volts

b.

volt seconds

c.

volts/sec

d.

volt-sec²

Discuss
Answer: (b).volt seconds
Q272.
A voltage V(t) which is a Gaussian ergodic random process with a mean of zero and a variance of 4 volt² is measured by a true rms meter. The reading will be

a.

0

b.

4

c.

2

d.

16

Discuss
Answer: (c).2
Q273.
Assertion (A): If I(s) = 2s+10 / s(s+2) , the final value of i(t) = 10

Reason (R): If I(s) = 2s+10 / s(s+2) , the initial value i(t) = 2

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: (d).A is false, R is true
Q274.
An ac circuit has an impedance of (3 + j6) ohm for fundamental. The impedance for fifth harmonic is

a.

(15 + j 30) ฮฉ

b.

(15 + j 6) ฮฉ

c.

(3 + j 30) ฮฉ

d.

(3 + j 1.2) ฮฉ

Discuss
Answer: (c).(3 + j 30) ฮฉ
Q275.
Which of following is recursive system?

a.

y(n - 1)

b.

y(n + 1)

c.

y(n)

d.

y(n) + y(n + 1)

Discuss
Answer: (a).y(n - 1)
Q276.
If i = 10 + 12 cos 500t - 3.5 sin 500 t, then in amplitude phasse form i =

a.

10 + 12.5 sin (500 t + 106.20°)

b.

5 + 12.5 sin (500 t + 106.20°)

c.

10 + 11 sin (500 t + 106.20°)

d.

10 + 12.5 sin (500 t + 10°)

Discuss
Answer: (a).10 + 12.5 sin (500 t + 106.20°)
Q277.
The real part of complex frequency s corresponds to oscillations.

a.

True

b.

False

c.

May be True or False

d.

can't say

Discuss
Answer: (b).False
Q278.
A unit step function is used to represent the closing a switch in a constant voltage system.

a.

True

b.

False

c.

May be True or False

d.

can't say

Discuss
Answer: (a).True
Q279.
A voltage v = 100 sin ฯ‰t + 10 sin 5 ฯ‰t is applied to a pure capacitor having capacitance of 1 ฮผF. If ฯ‰ = 314 rad/sec, the current through the capacitor is

a.

0.0314 cos 314 t + 0.0157 cos 1570 t

b.

0.0314 sin 314 t + 0.0157 sin 1570 t

c.

0.0314 cos 314 t + 0.0314 cos 1570 t

d.

0.0157 cos 314 t + 0.0157 cos 1570 t

Discuss
Answer: (a).0.0314 cos 314 t + 0.0157 cos 1570 t
Q280.
In terms of signum function sgn(t), unit step function u(t) =

a.

1 + sgn(t)

b.

1 - sgn(t)

c.

0.5 + 0.5 sgn(t)

d.

0.5 - 0.5 sgn(t)

Discuss
Answer: (c).0.5 + 0.5 sgn(t)
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