JEE PYQ: Communication System Question 22
Question 22 - 2019 (08 Apr 2019 Shift 2)
In a line of sight ratio communication, a distance of about 50 km is kept between the transmitting and receiving antennas. If the height of the receiving antenna is 70 m, then the minimum height of the transmitting antenna should be: (Radius of the Earth $= 6.4 \times 10^6$ m).
(1) 20 m
(2) 51 m
(3) 32 m
(4) 40 m
Show Answer
Answer: (3)
Solution
LOS $= \sqrt{2h_T R} + \sqrt{2h_R R}$. Solving gives $h_T = 32$ m.
BETA
