Home
Class 11
PHYSICS
The maximum frequency of transmitted rad...

The maximum frequency of transmitted radio waves above which the radio waves are no longer reflected back by ionosphere is (N = maximum electron density of ionosphere, g = acceleration due to gravity)

A

9 N

B

`9N^(2)`

C

`9sqrt(N)`

D

`9^(2)N_(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • COMMUNICATION SYSTEMS

    TARGET PUBLICATION|Exercise Evaluation Test|15 Videos

  • COMMUNICATION SYSTEMS

    TARGET PUBLICATION|Exercise Critical Thinking|34 Videos

  • ELECTRONS AND PHOTONS

    TARGET PUBLICATION|Exercise Evaluation Test|19 Videos

Similar Questions

Explore conceptually related problems

The waves which are reflected back to the earth by ionosphere is

The wave which are reflected back to the earth by ionosphere is

On a particular day, the maximum frequency reflected from the ionosphere is 10 MHz The maximum electron density in ionosphere is

From which layer of the atmosphere,radio waves are reflected back?

Radio waves are reflected back to earth from the

Frequecies higher than 5 MHz are found not to be reflceted by the ionosphere on a particular day at a place. The maximum electron density of the ionosphere is

TARGET PUBLICATION-COMMUNICATION SYSTEMS-Competitive Thinking
  1. The distance of coverage of a transmitting antenna is 12 . 8 km . Then...

    Text Solution

    |

  2. If a transmitting antenna of height 105 m is placed on a hill, then it...

    Text Solution

    |

  3. A ratio has a power of 1 kW and is operating at a frequency of 10 GHz ...

    Text Solution

    |

  4. Height of T .V . Tower is h(T) . The area of transmission of T . V . W...

    Text Solution

    |

  5. In an amplitude modulated wave for audio frequency of 500 "cycle"//sec...

    Text Solution

    |

  6. A modem is a

    Text Solution

    |

  7. The electromagnetic wave of frequency 3 MHz to 30 MHz are

    Text Solution

    |

  8. In which frequency range, space waves are normally propagated?

    Text Solution

    |

  9. Name the type of waves which are used for line of sight (LOS) communic...

    Text Solution

    |

  10. The ionosphere is used for the propagation of

    Text Solution

    |

  11. The maximum frequency of transmitted radio waves above which the radio...

    Text Solution

    |

  12. For sky wave propagation of a 10 MHz signal, what should be the minimu...

    Text Solution

    |

  13. A sky wave with a frequency 55 MHz is incidnet on D-region of earth's ...

    Text Solution

    |

  14. A diode detector is used to detect an amplitude modulated wave of 60% ...

    Text Solution

    |

  15. A telephonic communication service is working at carrier frequency of ...

    Text Solution

    |

  16. A transmitting antenna of height h and the receiving antenna of hight...

    Text Solution

    |

  17. In optical communication system operating at 1200nm, only 2% of the so...

    Text Solution

    |

  18. Assertion : Electromagentic waves with frequencies more than the cirti...

    Text Solution

    |

  19. A message signal frequency omega(m) is superpiosed on a carrier wave o...

    Text Solution

    |

  20. (a). Assertion (A) is true, Reason (R) is also true, Reason (R) is the...

    Text Solution

    |