Basic Operations on Signals – 1 MCQ’s

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This set of Signals & Systems Multiple Choice Questions & Answers (MCQs) focuses on “Basic Operations on Signals – 1″.

1. Resistor performs amplitude scaling when x (t) is voltage, a is resistance and y (t) is output current.
a) True
b) False

2. Which of the following is an example of physical device which adds the signals?
a) Radio
b) Audio mixer
c) Frequency divider
d) Subtractor

3. Which of the following is an example of amplitude scaling?
a) Electronic amplifier
b) Electronic attenuator
c) Both amplifier and attenuator
d) Adder

4. AM radio signal is an example for __________
a) y (t) = a x (t)
b) y (t) = x1 (t) + x2 (t)
c) y (t) = x1 (t) * x2 (t)
d) y (t) = -x(t)

5. Which of the component performs integration operation?
a) Resistor
d) Diode
c) Capacitor
d) Inductor

6. Y (t) = x (2t) is ________
a) Compressed signal
b) Expanded signal
c) Shifted signal
d) Amplitude scaled signal by a factor of 2

7. Which of the passive component performs differentiation operation?
a) Resistor
b) Capacitor
c) Inductor
d) Amplifier

8. Time scaling is an operation performed on _______
a) Dependent variable
b) Independent variable
c) Both dependent and independent variable
d) Neither dependent nor independent variable

9. Y (t) = x (t/5) is _______
a) Compressed signal
b) Expanded signal
c) Time shifted signal
d) Amplitude scaled signal by factor 1/5

10. In discrete signal, if y [n] = x [k*n] and k>1 then ______
a) Some samples are lost from x [n]
b) Some samples are added to x [n]
c) It has no effect on samples
d) Samples will be increased with factor k

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