In a line of sight radio 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 × 10 6 m )

Question

In a line of sight radio 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 × 10 6 m ), 20 m, 51 m, 40 m, 32 m

MARKS App · Accepted Answer

Range, d = 2 R h T + 2 R h r ⇒ 50 = 2 × 6400 × h T + 2 × 6400 × 70 × 10 - 3 ⇒ 2 × 6400 × h T = 50 - 8 14 h T = 50 - 8 14 2 2 × 6400 = 0.031458 k m h T ≈ 32 m

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