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A radio transmitter antenna of height 100 m stands at the top of a tall building. At a point on the ground, the angle of elevation of bottom of the antenna is 45^@ and that of top of antenna is 60^@ . What is the height of the building ?

A radio transmitter antenna of height 100 m stands at the top of a tall building. At a point on the ground, the angle of elevationof the bottom of the antenna is 45^(@) and that of the the top of the antenna is 60^(@) . What is the height of the building ?

A transmitting antenna of height 25 m is fitted at the top of a tower of height 20m. What is the height of the receiving antenna from ground level if the maximum distance between transmitting antenna and receiving antenna on ground is 56 km. Radius of earth = 6400 km.

A TV transmission tower antenna is at a height of 20m. Suppose that the receiveing antenna is at. (i) ground level (ii) a height of 5m The increase in antenna range in case (ii) relative to case (i) is n%. The value of n, to the nearest integer, is..........

A transmitting antenna at the top of a tower has a height of 45 m and height of the receiving antenna is 80 m . What is the maximum distance between them , for satisfactory communication of LOS mode ? Radius of earth = 6400 km .

If the whole earth is to be connected by LOS communication using space waves ( no restriction of antenna size or tower height), what is the minimum no of antennas required ? Calculate the tower height of these antennas in terms of earth's radius?

A signal is to be transmitted through a wave of wavelength lambda , using a linear antenna. The length 1 of the antenna and effective power radiated P_(eff) will be given respectively as : (K is a constant of proportionality)

A radio transmitting station operating at a frequency of 120 MHz has two identical antennas that radiate in phase. Antenna B is 9 m to the right of antenna A. consider point P at a horizontal distance x to the right of antenna A as shown in figure. The value of x and order for which the constructive interference will occur at point P are