Home
Class 12
PHYSICS
Which one of the following statements is...

Which one of the following statements is wrong?

A

1. Ground wave propagation can be sustained at frequencies 500 KHz to 1500 KHz.

B

2. Satellite communication is useful for the frequencies above 30 MHz.

C

3. Sky wave propagation is useful in the range of 30 to 40 MHz.

D

4. Space wave propagation takes place through tropospheric space.

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • COMMUNITCATION SYSTEMS

    NCERT FINGERTIPS|Exercise Modulation And Its Necessity|14 Videos

  • COMMUNITCATION SYSTEMS

    NCERT FINGERTIPS|Exercise Amplitude Modulation|20 Videos

  • COMMUNITCATION SYSTEMS

    NCERT FINGERTIPS|Exercise Bandwidth Of Transmission Medium|24 Videos

  • ATOMS

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos

  • CURRENT ELECTRICITY

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos

Similar Questions

Explore conceptually related problems

Which one of the following statement is wrong ?

Which one of the following statement is wrong ?

Which one of the following statement is wrong ?

Which one of the following statement is wrong

Which one of the following statement is wrong ?

Which one of the following statement is wrong ?

Which one of the following statement is wrong?

Which one of the following statement is wrong ?

Which one of the following statement is wrong ?

NCERT FINGERTIPS-COMMUNITCATION SYSTEMS-Propagation Of Electromagnetic Waves
  1. The mode of propagation used by short wave broadcast services is

    Text Solution

    |

  2. The skip zone in radio wave trasmission is that range where

    Text Solution

    |

  3. Which one of the following statements is wrong?

    Text Solution

    |

  4. The waves that are bent down by the ionosphere are

    Text Solution

    |

  5. The maximum line-of -sight distance d(M) between two antennas having h...

    Text Solution

    |

  6. Frequencies in the UHF range normally propagate by means of:

    Text Solution

    |

  7. If the whole earth is to be connected by LOS communication using spac...

    Text Solution

    |

  8. A ground receiver in line-of-sight communication cannot receive direct...

    Text Solution

    |

  9. Which of the following modes is used for line of sight

    Text Solution

    |

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

    Text Solution

    |

  11. Which of the following frequencies will be suitable for beyond the hor...

    Text Solution

    |

  12. A TV transmitting antenna is 81 m tall. How much service area it can c...

    Text Solution

    |

  13. A transmitting antenna at the top of the tower has a height 18 m and t...

    Text Solution

    |

  14. A transmitting antenna of height 20 m and the receiving antenna of hei...

    Text Solution

    |

  15. A TV transmission tower of antenna is at a height of 20 m. How much se...

    Text Solution

    |

  16. By what percentage will the transmission range of a T.V. tower be affe...

    Text Solution

    |

  17. A TV transmission tower has a height of 240 m. Signals broadcast from ...

    Text Solution

    |

  18. A fax message is to be sent from Delhi to Washington via a geostationa...

    Text Solution

    |

  19. A 50MHz sky wave takes 4.04 ms to reach a receiver via retransmission ...

    Text Solution

    |

  20. What should be the length of the dipole antenna for a carrier wave of ...

    Text Solution

    |