Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main202226 Jun 2022Evening ShiftPhysicsCommunication SystemActual

A sinusoidal wave y t = 40 sin 10 × 10 6 π t is amplitude modulated by another sinusoidal wave x t = 20 sin 1000 π t . The amplitude of minimum frequency component of modulated signal is

Options

  1. A0 . 5
  2. B0 . 25
  3. C20
  4. D10

Correct answer

D. 10

Step-by-step solution

Here, modulation index, μ = A m A c = 20 40 = 1 2 Modulated amplitude = μ Ac 2 = 1 2 × 40 2 = 10

Practice Communication System on Quantrex Academy →

More from Communication System

The height of transmitting antenna is 180 m and the height of the receiving antenna is 245 m . The maximum distance between them for satisfactory communication in line of sight wil 2023To radiate EM signal of wavelength λ with high efficiency, the antennas should have a minimum size equal to: 2023Match List-I with List-II List-I (Layer of atmosphere) List-II (Approximate height over earth's surface) ( A ) F 1 - Layer ( I ) 10 km B D - Layer II 170 - 190 km C Troposphere 2023The amplitude of 15 sin ( 1000 π t ) is modulated by 10 sin ( 4 π t ) signal. The amplitude modulated signal contains frequencies of A. 500 Hz B. 2 Hz C. 250 Hz D. 498 Hz 2023In satellite communication, the uplink frequency band used is: 2023A transmitting antenna is kept on the surface of the earth. The minimum height of receiving antenna required to receive the signal in line of sight at 4 km distance from it is x &# 2023A massage signal of frequency 3 kHz is used to modulate a carrier signal of frequency 1 . 5 MHz . The bandwidth of the amplitude modulated wave is 2023A carrier wave of amplitude 15 V is modulated by a sinusoidal base band signal of amplitude 3 V . The ratio of maximum amplitude to minimum amplitude in an amplitude modulated wave 2023 Full Communication System list All JEE Main PYQs