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Question 20268
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Principles of Communication: Digital Communication MCQ

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

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Digital CommunicationHardQuestion 20268

Question

Shannon's channel capacity formula C = B log₂(1 + S/N) states that capacity:
  1. A
    Is independent of signal-to-noise ratio
  2. B
    Increases with bandwidth B and SNR
    Correct
  3. C
    Is fixed at B bits/s always
  4. D
    Decreases with increasing bandwidth

Correct answer

Increases with bandwidth B and SNR

Explanation

Shannon's theorem gives the theoretical maximum bit rate. Doubling SNR increases capacity by B bits/s; doubling bandwidth doubles capacity (roughly). This is the fundamental limit — no coding scheme can exceed it.

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