Home/
Competitive Exams/
JEE Main & Advanced/
Physics/
Principles of Communication/
Question 20230
JEE Physics · Hard

Principles of Communication: Digital Communication MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

Timer-based practiceDetailed answer reviewMobile-friendly flow
Digital CommunicationHardQuestion 20230

Question

Nyquist's sampling theorem states that a band-limited signal of bandwidth B must be sampled at a rate of at least:
  1. A
    B samples/s
  2. B
    B/2 samples/s
  3. C
    2B samples/s
    Correct
  4. D
    4B samples/s

Correct answer

2B samples/s

Explanation

Nyquist rate fs ≥ 2fmax = 2B. Sampling below this rate causes aliasing — different signals become indistinguishable. Voice telephony (B = 4 kHz) is sampled at 8000 samples/s.

Review Principles of Communication notesStart timed chapter practice