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Question 20240
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Principles of Communication: Propagation MCQ

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

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PropagationEasyQuestion 20240

Question

The maximum distance for space-wave LOS transmission between a transmitting tower of height h_T and a receiving tower of height h_R is:
  1. A
    d = √(2Rh_T) + √(2Rh_R)
    Correct
  2. B
    d = √(Rh_T) + √(Rh_R)
  3. C
    d = 2R(h_T + h_R)
  4. D
    d = √(h_T × h_R)

Correct answer

d = √(2Rh_T) + √(2Rh_R)

Explanation

Line-of-sight range: dT = √(2RhT) to horizon from transmitter; dR = √(2RhR) to horizon from receiver. Total d = dT + dR. R = 6400 km.

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