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Test: Introduction to Signals - Electronics and Communication Engineering (ECE) MCQ


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10 Questions MCQ Test - Test: Introduction to Signals

Test: Introduction to Signals for Electronics and Communication Engineering (ECE) 2024 is part of Electronics and Communication Engineering (ECE) preparation. The Test: Introduction to Signals questions and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus.The Test: Introduction to Signals MCQs are made for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Introduction to Signals below.
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Test: Introduction to Signals - Question 1

The signal x(t) = A cos(ωt + φ) is:

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All bounded periodic signals are power signals, because they do not converge to a finite value so their energy is infinite and their power is finite.

Test: Introduction to Signals - Question 2

What is the total energy of the rectangular pulse shown in figure below?

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Test: Introduction to Signals - Question 3

The value of  is the Dirac delta function, is

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Test: Introduction to Signals - Question 4

What is the simplified value of y(n) if

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Test: Introduction to Signals - Question 5

The sampling of a function f(t) = sin(2πf0t) starts from zero-crossing. The signal can be detected, if sampling time T is:

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Because fs ≤ 2f0,

Ts ≤ .

Test: Introduction to Signals - Question 6

What is the power and energy of the unit step sequence u(n) respectively?

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Test: Introduction to Signals - Question 7

For a periodic signal v(t) = 30 sin100t + 10 cos300t + 6 sin(500t + π/4), the
fundamental frequency in rad/s is

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Test: Introduction to Signals - Question 8

If a signal f(t) has energy ‘E’ the energy of the signal f(2t) is equal to:

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and 

⇒  

Test: Introduction to Signals - Question 9

Consider the sequence: x[n] = [- 4 - j5, 1 + j2, 4], the conjugate anti-symmetric part of the sequence is:

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Test: Introduction to Signals - Question 10

The function x(t) is shown in the figure. Even and odd parts of a unit step function u(t) are respectively:

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x(t) = u(t) - u(-t)

 

u(t) = 

u(-t) = 

-u(-t) = 

Hence, 

x(t) = u(t) - u(-t)

 

 

even part = [u(t) + u(-t)] / 2 = 1/2

odd part = [u(t) - u(-t)] / 2 = 1/2[x(t)]

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