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Test: Basic Operations on Signals - Electrical Engineering (EE) MCQ


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10 Questions MCQ Test Signals and Systems - Test: Basic Operations on Signals

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

Which of the following is an example of amplitude scaling?

Detailed Solution for Test: Basic Operations on Signals - Question 1

Amplitude scaling refers to multiplication of a constant with the given signal.
It is given by y (t) = a x (t). It can be both increase in amplitude or decrease in amplitude.

Test: Basic Operations on Signals - Question 2

AM radio signal is an example for __________

Detailed Solution for Test: Basic Operations on Signals - Question 2

AM radio signal is an example for y (t) = x1 (t) * x2 (t) where, x1 (t) consists of an audio signal plus a dc component and x2 (t) is a sinusoidal signal called carrier wave.

Test: Basic Operations on Signals - Question 3

 Which of the following is an example of physical device which adds the signals?

Detailed Solution for Test: Basic Operations on Signals - Question 3

Audio mixer is a device which combines music and voice signals. It is given by
Y (t) = x1 (t) + x2 (t).

Test: Basic Operations on Signals - Question 4

Which of the passive component performs differentiation operation?

Detailed Solution for Test: Basic Operations on Signals - Question 4

Inductor performs differentiation. It is given by y (t) = L d/dt i(t) where, I (t) denotes current flowing through an inductor of inductance L.

Test: Basic Operations on Signals - Question 5

Time scaling is an operation performed on _______

Detailed Solution for Test: Basic Operations on Signals - Question 5

Time scaling is an example for operations performed on independent variable time.
It is given by y (t) = x (at).

Test: Basic Operations on Signals - Question 6

Y (t) = x (t/5) is _______

Detailed Solution for Test: Basic Operations on Signals - Question 6

y (t) = x (at), comparing this with the given expression we get a = 1/5. If 0 < a < 1 then it is expanded (stretched) version of x (t).

Test: Basic Operations on Signals - Question 7

Which of the component performs integration operation?

Detailed Solution for Test: Basic Operations on Signals - Question 7

Capacitor performs integration. V (t) developed across capacitor is given by
v (t) = (1/C)* ∫t-∞ i (∂).d∂, I (t) is the current flowing through a capacitor of capacitance C.

Test: Basic Operations on Signals - Question 8

Y (t) = x (2t) is ________

Detailed Solution for Test: Basic Operations on Signals - Question 8

By comparing the given equation with y (t) = x (at) we get a = 2. If a > 1 then it is compressed version of x (t).

Test: Basic Operations on Signals - Question 9

 In discrete signal, if y [n] = x [k x n] and k > 1 then ______

Detailed Solution for Test: Basic Operations on Signals - Question 9

For discrete time signal y [n] = x [k x n] and k > 1, it will be compressed signal and some samples will be lost. The samples lost will not violate the rules of sampling theorem.

Test: Basic Operations on Signals - Question 10

Consider below figure , is the given y (t) an integration of x (t)?

Detailed Solution for Test: Basic Operations on Signals - Question 10

The given y (t) is integral of x (t) and amplitude 3 remains constant for t > 1.
It is because of the properties of integration.

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