Home
Class 12
PHYSICS
The height from the surface of earth and...

The height from the surface of earth and electron density of `D` layer of earth's atmosphere are

A

`65 km , 10^(9) m^(-3)`

B

`100 km , 10^(9) m^(-3)`

C

`180 km , 10^(11) m^(-3)`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • COMMUNICATION SYSTEMS

    PRADEEP|Exercise Multiple choice questions|3 Videos

  • COMMUNICATION SYSTEMS

    PRADEEP|Exercise Multiple Choice Question|4 Videos

  • COMMUNICATION SYSTEMS

    PRADEEP|Exercise Value Based Questions|4 Videos

  • ATOMS AND NUCLEI

    PRADEEP|Exercise Assertion- Reason type question 12|1 Videos

  • CURRENT ELECTRICITY

    PRADEEP|Exercise Problems for Practice (B)|2 Videos

Similar Questions

Explore conceptually related problems

The lowest layer of earth's atmosphere is

Ozone layer above earth's atmosphere will not

The outermost layer of the Earth's atmosphere is

A planet has radius ((1)/(36)) th of the radius of the earth. The escape velocity on the surface of the planet was found to be (1)/(sqrt(6)) times the escape velocity from the surface of e earth. The planet is surrounded by a thin layer of atmosphere having thickness h (ltlt radius of the planet). The average density of the atmosphere on the planet is d and cceleration due to gravity on the surface of the earth is g_(e) . Find the value of atmospheric pressure on the surface of the planet.

A stone is dropped from a height equal to nR , where R is the radius of the earth, from the surface of the earth. The velocity of the stone on reaching the surface of the earth is

Draw a neat, labelled diagram showing different layers of the Earth's atmosphere.

Gravitational potential at a height R from the surface of the earth will be [Take M = mass of the earth, R = radius of the earth]

PRADEEP-COMMUNICATION SYSTEMS-Exercise
  1. If v(r) is velocity of red light and v(b) is velocity of blue light in...

    Text Solution

    |

  2. Which of the following is not an electromagnetic wave?

    Text Solution

    |

  3. The height from the surface of earth and electron density of D layer o...

    Text Solution

    |

  4. The wavelength range of SHF ( super high frequency) waves is

    Text Solution

    |

  5. Ground wave propagation is not suited for

    Text Solution

    |

  6. Sky wave propagation is also called

    Text Solution

    |

  7. The correct relation between plasma frequency v of a radio wave and el...

    Text Solution

    |

  8. Refractive index mu of a layer in sky wave propagation is given by

    Text Solution

    |

  9. Line of sight propagation is

    Text Solution

    |

  10. Minimum number of geostationary satellites needed for stallite communi...

    Text Solution

    |

  11. Through which mode of propagation, the radio waves can be sent from on...

    Text Solution

    |

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

    Text Solution

    |

  13. The height of a TV tower is 180 m. To what distance the transmission c...

    Text Solution

    |

  14. When the antenna is held parallel to horizontal surface of earth , the...

    Text Solution

    |

  15. The gaseous envelope surrounding the earth is called ……….

    Text Solution

    |

  16. F(2)- layer of eath's atmosphere is at a vertical height of about ………...

    Text Solution

    |

  17. The electromagnetic wave is of frequency range from 5xx10^5 Hz to 10^...

    Text Solution

    |

  18. The phenomenon of loss of power of a ground wave is called ……..

    Text Solution

    |

  19. A mode of wave propagation is also known as ………

    Text Solution

    |

  20. Sky wave propagation is also called

    Text Solution

    |