AP EAMCET · PHYSICS · Communication System
A transmitting antenna of height \(20 \mathrm{~m}\) and the receiving antenna of height \(h\) are separated by a distance of \(40 \mathrm{~km}\) for satisfactory communication in line of sight (Los) mode. Then the value of \(h\) is (Give, radius of earth is \(6400 \mathrm{~km}\).)
- A 40 m
- B 45 m
- C 30 m
- D 25 m
Answer & Solution
Correct Answer
(B) 45 m
Step-by-step Solution
Detailed explanation
Given, height of transmitting antenna \(h_T=20 \mathrm{~m}\), distance of LOS, \(d_m=40 \mathrm{~km}\) As maximum distance of line of sight mode \(d_m=\sqrt{2 R h_T}+\sqrt{2 R h_R}\) putting the given values, we get…
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