An antenna is mounted on a 400 m tall building. What will be the wavelength of signal that can be radiated effectively by the transmission tower upto a range of 44 km ?

Question

An antenna is mounted on a 400 m tall building. What will be the wavelength of signal that can be radiated effectively by the transmission tower upto a range of 44 km ?, 605 m, 302 m, 37 . 8 m, 75 . 6 m

MARKS App · Accepted Answer

d = 2 R h T ⇒ 44 × 10 3 = 2 × 6400 × 10 3 × h T ⇒ h T = 151 . 25 m ∵ l antenna ≥ λ 4 ⇒ λ ≤ 4 l considering, h T = 1 = length of antenna λ = 4 × 151 . 25 = 605 m

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