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  • An antenna is mounted on a tall building. What will be the wavelength of signal that can be radiated effectively by the transmission tower upto a r

An antenna is mounted on a 400 \mathrm{~m} tall building. What will be the wavelength of signal that can be radiated effectively by the transmission tower upto a range of 44 \mathrm{~km} ?
Option: 1 605\: m
Option: 2 302\: m
Option: 3 37.8\: m
Option: 4 75.6\: m

Answers (1)

best_answer

Range of Transmission = \sqrt{2hR}

Height of transmission tower = h= h_{building }+h_{antenna}

44000= \sqrt{2\times h\times 6400\times10^{3}}

44000\times 44000= 2h\times 6400\times10^{3}

h_{min}= 151.25

\lambda = 4h= 605m

Posted by

vishal kumar

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