Home
Class 12
PHYSICS
Why audio signals cannotbe transmitted d...

Why audio signals cannotbe transmitted directly into space ?

Text Solution

Verified by Experts

(i) Energy of audio signals is very low. So they die after travelling a small distance.
(ii) The audio signals transmitted from the different stations get inseparably mixed up.
(iii) Very tall antennas are required, which are practically impossible to make.
Promotional Banner

Topper's Solved these Questions

  • PRINCIPLES OF COMMUNICATION

    BETTER CHOICE PUBLICATION|Exercise NUMERICAL PROBLEMS|9 Videos

  • PRINCIPLES OF COMMUNICATION

    BETTER CHOICE PUBLICATION|Exercise NUMERICAL PROBLEMS|9 Videos

  • POLARISATION OF LIGHT

    BETTER CHOICE PUBLICATION|Exercise Most Expected Questions|4 Videos

  • RADIOACTIVITY

    BETTER CHOICE PUBLICATION|Exercise MOST EXPECTED QUESTIONS |6 Videos

Similar Questions

Explore conceptually related problems

How many different signals can be transmitted by arranging 3 red, 2 yellow and 2 green flags on a pole ?

For a CE-transistor amplifier, the audio signal voltage across the collected resistance of 2 k omega is 2 V. Suppose the current amplificationfactor of the transistor is 100, find the input signal voltage nd base current, if the base resistance is 1 k omega .

Why Fluorination of benzene not possible directly ?

Why should not we see directly towards the Sun?

11 kW of electric power can be transmitted to a distant station at (i)220 V. (ii) 22000 V. Which of the two transmission modes be preferred and why ? Support your answer with calculations.

BETTER CHOICE PUBLICATION-PRINCIPLES OF COMMUNICATION -SHORT ANSWER TYPE QUESTIONS
  1. What is space wave propagation ? Why is it limited upto small distance...

    Text Solution

    |

  2. What is the need for modulation ?

    Text Solution

    |

  3. Why audio signals cannotbe transmitted directly into space ?

    Text Solution

    |

  4. Explain basic elements of communication system with the help of block ...

    Text Solution

    |

  5. What are the limitations of amplitude modulation ?

    Text Solution

    |

  6. Give one difference between point to point mode of communication and b...

    Text Solution

    |

  7. Why is ground wave propagation not suitable for high frequency ?

    Text Solution

    |

  8. Explain the term ground waves propagation of radio-waves.

    Text Solution

    |

  9. Explain why sky wave propagation is not possible for high frequency ra...

    Text Solution

    |

  10. What is space wave propagation ? Give one example of communication sys...

    Text Solution

    |

  11. Write any two factors, which justify the need of modulation for the tr...

    Text Solution

    |

  12. Explain space wave propagation.

    Text Solution

    |

  13. What do you mean by medium wave band and short wave band ?

    Text Solution

    |

  14. Define frequency modulation.

    Text Solution

    |

  15. What do you mean by medium wave band and short wave band ?

    Text Solution

    |

  16. What is remote sensing? WHat are the uses of remote sensing satellites...

    Text Solution

    |

  17. Compare amplitude modulation and frequency modulation.

    Text Solution

    |

  18. Write any four advantages of optical fibre communication.

    Text Solution

    |

  19. What is modem?

    Text Solution

    |

  20. Draw a labelled block diagram of a basic communication system.

    Text Solution

    |