Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2012PhysicsCommunication SystemActual

The sound waves after being converted into electrical waves are not transmitted as such because

Options

  1. Athey travel with the speed of sound
  2. Bthe frequency is not constant
  3. Cthey are heavily absorbed by the atmosphere
  4. Dthe height of antenna has to be increased several times

Correct answer

C. they are heavily absorbed by the atmosphere

Step-by-step solution

The electric waves do not have the capacity to travel through the atmosphere. They get immediately grounded and they become neutral as fast as possible. This makes electrical waves incapable to travel through the atmosphere.

Practice Communication System on Quantrex Academy →

More from Communication System

Assertion : Sky wave signals are used for long distance radio communication. These signals are in general less stable than ground wave signals. Reason : The state of ionosphere var 2019Assertion : Sky wave signals are used for long distance radio communication. These signals are in general less stable than ground wave signals. Reason : The state of ionosphere var 2019Assertion : Sky wave signals are used for long distance radio communication. These signals are in general, less stable than ground wave signals. Reason : The state of ionosphere va 2018A ground receiver receives a signal at 5 MHz , transmitted by a ground transmitter at a height of 320 ~m , which is 110 ~km away from it. Then it can communicate through (radius of 2018If the modulation index of an amplitude modulated wave is changed from 0 to 1 , then the transmitted power will be 2018In an amplitude modulated signal the maximum amplitude is 15 volt and minimum amplitude is 5 volt, then amplitude of modulating wave will be 2018A ground receiver receives a signal at 5 MHz , transmitted by a ground transmitter at a height of 320 ~m , which is 110 ~km away from it. Then it can communicate through (radius of 2018If the modulation index of an amplitude modulated wave is changed from 0 to 1 , then the transmitted power will be 2018 Full Communication System list All NEET PYQs