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electronics and communication engineering exam question papers
1. An audio signal is band limited to 4 kHz. It is sampled at 8 kHz. What will be the spectrum of the sampled signal?
(A): -4 kHz to 4 kHz
(B): -8 kHz to 8 kHz
(C): every ± 8 kHz and operating as well as at zero (k integer)
(D): every 4n kHz repeating
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