CUET · PHYSICS · PYQ PAPER 2023
The maximum distance between the transmitting and receiving antenna for a satisfactory communication in LOS mode is 48 Km . If the height of the receiving antenna is 8 (Given radius of earth \(R_e=6400 km\) )
- A 20 m
- B 40 m
- C 80 m
- D 180 m
Answer & Solution
Correct Answer
(A) 20 m
Step-by-step Solution
Detailed explanation
\(d = \sqrt{2R_e h_T} + \sqrt{2R_e h_R}\) \(48 = \sqrt{2 \times 6400 \times h_T} + \sqrt{2 \times 6400 \times (80/1000)}\) \(48 = \sqrt{12800 h_T} + \sqrt{1024}\) \(48 = \sqrt{12800 h_T} + 32\) \(16 = \sqrt{12800 h_T}\) \(16^2 = 12800 h_T\) \(256 = 12800 h_T\)…
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