Languages [Samsung Placement]: Sample Questions 3 - 3 of 3

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Question 3

Question

MCQ▾

What minimum sampling frequency is required for 20 − 20 kHz analog signal? (2004)

Choices

Choice (4)

a.

44.1 kHz

b.

20 kHz

c.

40 kHz

d.

20 Hz

Answer

c.

Explanation

According to Nyquist Criteria the sampling frequency should be greater or equal to two times the signal frequency to remove the effects of aliasing effect. Here, highest signal frequency component is 20 kHz. So, to receive the correct signal at the receiver end the sampling frequency should be at least twice of it. So, sampling frequency should be 40 kHz.

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