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Which signal is said to be power signal?

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Which signal is said to be power signal?

(a) Infinite power and zero energy

(b) Infinite power and non-zero energy

(c) Finite power and infinite energy

(d) Finite power and zero energy

The question was posed to me in an interview for internship.

This key question is from Classification of Signals in portion Signals and Spectra of Digital Communications

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Best answer
Correct choice is (c) Finite power and infinite energy

Explanation: A signal is said to be power signal if it has finite power and infinite energy.

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