TS EAMCET · Physics · Communication System
A TV transmitting antenna is \(128 \mathrm{~m}\), tall. If the receiving antenna is at the ground level, the maximum distance between, them for satisfactory communication in line of sight mode is (radius of the earth \(6.4 \times 10^6 \mathrm{~m}\) )
- A \(64 \times \sqrt{10} \mathrm{~km}\)
- B \(\frac{128}{\sqrt{10}} \mathrm{~km}\)
- C \(128 \times \sqrt{10} \mathrm{~km}\)
- D \(\frac{64}{\sqrt{10}} \mathrm{~km}\)
Answer & Solution
Correct Answer
(B) \(\frac{128}{\sqrt{10}} \mathrm{~km}\)
Step-by-step Solution
Detailed explanation
Height of transmitting antenna \(d \approx \sqrt{2 R_e h_T}\) Given \(\begin{aligned} R_e & =6.4 \times 10^6 \mathrm{~m} \\ h_T & =128 \mathrm{~m} \\ d & =? \end{aligned}\) The maximum distance…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- A charge \(q\) enters a region having electric field \(\mathbf{E}\) and magnetic field \(\mathbf{B}\) with velocity \(\mathbf{v}\). If it continues to move with the same velocity, then which of the following statement is not trueTS EAMCET 2018 Easy
- For an amplitude modulated wave, the maximum amplitude is found to be \(10 \mathrm{~V}\) while the minimum amplitude is found to be \(4 \mathrm{~V}\). The modulation index isTS EAMCET 2021 Easy
- A uniform circular disc of radius \(R\), lying on a frictionless horizontal plane is rotating with an angular velocity ' \(\omega\) ' about is its own axis. Another identical circular disc is gently placed on the top of the first disc coaxially. The loss in rotational kinetic energy due to friction between the two discs, as they acquire common angular velocity is ( \(I\) is moment of inertia of the disc)TS EAMCET 2013 Easy
- A stone falls freely under gravity. It covers distance, and, in the first , seconds, and the next, seconds respectively. The ratio isTS EAMCET 2021 Easy
- If a man of mass \(50 \mathrm{~kg}\) is in a lift moving down with an acceleration equal to acceleration due to gravity, then the apparent weight of the man isTS EAMCET 2023 Easy
- Three identical vessels are filled with three liquids A, B, and \(C\) with equal masses but having densities \(\rho_A, \rho_B\) and \(\rho_C\) respectively. If \(\rho_A>\rho_B>\rho_C\) then the pressure at the bottom of the vessels will beTS EAMCET 2023 Easy
More PYQs from TS EAMCET
- 20 kV electrons can produce X-rays with a minimum wavelength ofTS EAMCET 2025 Medium
- A body starting at from origin and oscillates simple harmonically with a period of . After what time will its kinetic energy be of its total energyTS EAMCET 2022 Hard
- A particle is moving in xy-plane as \(\vec{x}=\left(4 t+t^2\right) \hat{i}, \vec{y}=\left(2 t+\frac{t^2}{2}\right) \hat{j}\) where \(\vec{x} \& \vec{y}\) are displacements measured along \(\mathrm{x}\) and y axes respectively in meters and \(t\) in seconds. What is the velocity of the particle?TS EAMCET 2022 Easy
- A vibration magnetometer consists of two identical bar magnets placed one over the other such that they are perpendicular and bisect each other. The time period of oscillation in a horizontal magnetic field \(2^{5 / 4} \mathrm{~s}\). One of the magnets is removed and if the other magnet oscillates in the same field, then the time period in seconds is :TS EAMCET 2003 Hard
- A steel rod with a circular cross-section of diameter 1 cm and another steel rod with a square cross-section of side 1 cm have equal mass. If the two rods are subjected to same tension, the ratio of the elongations of the two rods isTS EAMCET 2025 Medium
- A gas system is taken through the thermodynamic cyclic process 1 → 2 → 3 → 1 as shown below. The amount of heat released by the system is
TS EAMCET 2022 Medium