Signal Transformations MCQs

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

Question 1

Signals & SystemsSignal Transformations

Which operation represents a time delay of 3 seconds applied to x(t)?

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Correct Answer: B. x(t-3)

Explanation: Replacing t by t-3 shifts the signal to the right by 3 seconds, representing a delay.

Reference: Standard signals and systems: signal transformations

Question 2

Signals & SystemsSignal Transformations

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Correct Answer: B. Time-compressed by 2

Explanation: Replacing t by 2t compresses the time axis by a factor of 2.

Reference: Standard signals and systems: signal transformations

Question 3

Signals & SystemsSignal Transformations

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Correct Answer: B. Time-expanded by 2

Explanation: Replacing t by t/2 expands the time axis by a factor of 2.

Reference: Standard signals and systems: signal transformations

Question 4

Signals & SystemsSignal Transformations

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Correct Answer: B. Time reversal

Explanation: Changing t to -t reflects the signal about t=0, which is time reversal.

Reference: Standard signals and systems: signal transformations