TS EAMCET · Physics · Communication System
A person tries to broadcast with the same antenna both the signals at \(10^7 \mathrm{~Hz}\) and \(10^6 \mathrm{~Hz}\). If the receiver at some distance has to receive an equal strength for both the frequencies, then the broadcaster has to approximately increase the signal strength at \(10^6 \mathrm{~Hz}\) to \(10^7 \mathrm{~Hz}\) by
- A \(\frac{1}{10}\) times
- B 10 times
- C 100 times
- D \(\frac{1}{100}\) times
Answer & Solution
Correct Answer
(C) 100 times
Step-by-step Solution
Detailed explanation
Power of signal radiated by an antenna \(P \propto \frac{1}{\lambda^2}\), where, \(\lambda=\) wavelength of signal or \(P \propto v^2\), where, \(v=\) frequency so \(\frac{P_1}{P_2}=\frac{v_1^2}{v_2^2}\) Given, \(v_1=10^7 \mathrm{~Hz}, \mathrm{v}_2=10^6 \mathrm{~Hz}\)…
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
- Identify the correct option.TS EAMCET 2019 Easy
- If the displacement of a body is given by \(x=3 \cos \left[2 \pi t+\frac{\pi}{4}\right] \mathrm{m}\), then the acceleration of the body at \(t=2 \mathrm{~s}\) isTS EAMCET 2019 Easy
- At time \(t=0\), a force \(\mathrm{F}=\alpha t\), where \(t\) is time in seconds, is applied to a body of mass \(1 \mathrm{~kg}\), resting on a smooth horizontal plane. If the direction of the force makes an angle of \(45^{\circ}\) with the horizontal, then the velocity of the body at the moment of its breaking off the plane isTS EAMCET 2022 Easy
- An object is placed in front of a spherical concave mirror between the focal point and the radius of curvature. Its image isTS EAMCET 2021 Hard
- A conductor of length 1.5 m and area of cross-section \(3 \times 10^{-5} \mathrm{~m}^2\) has electrical resistance of \(15 \Omega\). The current density in the conductor for an electric field of \(21 \mathrm{Vm}^{-1}\) isTS EAMCET 2024 Easy
- Two blocks of masses \(W_1\) and \(W_2\) are suspended from the ends of a light string passing over a smooth fixed pulley. If the pulley is pulled up with an acceleration ' \(\mathrm{g}\) ', then the tension in the string will beTS EAMCET 2023 Easy
More PYQs from TS EAMCET
-
Find potential difference points \(A \& F\) and \(F \&\) \(B\).TS EAMCET 2020 Hard - When a liquid is heated in copper vessel its coefficient of apparent expansion is \(6 \times 10^{-6} /{ }^{\circ} \mathrm{C}\). When the same liquid is heated in a steel vessel its coefficient of apparent expansion is \(24 \times 10^{-6} /{ }^{\circ} \mathrm{C}\). If coefficient of linear expansion for copper is \(18 \times 10^{-6} /{ }^{\circ} \mathrm{C}\), the coefficient of linear expansion for steel isTS EAMCET 2012 Easy
- A conducting wire bent in the shape of semicircle has length L and moves in its plane with constant velocity v. A uniform magnetic field exists in the direction perpendicular to the plane of the wire. The velocity makes an angle to the diameter joining free ends and the emf induced between the ends of the wire is . The value of constant isTS EAMCET 2019 Easy
- A horizontal pipeline carrying gasoline has a cross-sectional diameter of \(5 \mathrm{~mm}\). If the viscosity and density of the gasoline are \(6 \times 10^{-3}\) Poise and \(720 \mathrm{~kg} / \mathrm{m}^3\) respectively, the velocity after which the flow becomes twrbulent isTS EAMCET 2017 Medium
- A semiconductor is doped with phosphorous atoms as impurity. The impurity levels created in the semiconductor are close to theTS EAMCET 2020 Easy
- The wavelength of the radiation emitted by a black body is \(1 \mathrm{~mm}\) and Wien's constant is \(3 \times 10^{-3} \mathrm{mK}\). Then the temperature of the black body will beTS EAMCET 2019 Easy