Elementary Signals MCQs

Practice Elementary Signals MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1

Signals & SystemsElementary Signals

The continuous-time unit step u(t) is conventionally equal to 1 for?

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Correct Answer: B. t>0

Explanation: Under the usual convention, u(t)=0 for t0; the value exactly at t=0 depends on convention.

Reference: Standard signals and systems: elementary signals

Question 2

Signals & SystemsElementary Signals

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Correct Answer: B. Area

Explanation: The Dirac impulse is characterized by zero value away from t=0 and unit area over an interval containing the origin.

Reference: Standard signals and systems: elementary signals

Question 3

Signals & SystemsElementary Signals

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Correct Answer: B. delta(t)

Explanation: In the generalized-function sense, d[u(t)]/dt = delta(t).

Reference: Standard signals and systems: elementary signals

Question 4

Signals & SystemsElementary Signals

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Correct Answer: A. u(t)

Explanation: Integrating the unit impulse from -infinity up to t produces the unit-step function.

Reference: Standard signals and systems: elementary signals

Question 5

Signals & SystemsElementary Signals

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Correct Answer: C. x(t0)

Explanation: The shifted impulse samples the signal at its location: ∫x(t)delta(t-t0)dt=x(t0).

Reference: Standard signals and systems: elementary signals